Elementary School Science Quiz: Selecting Best Solution
20 questions · exam conditions
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Selecting Best SolutionQuestion 1 of 20

The library needs to track borrowed books. It must be reliable, quick, and under $100. System A uses paper cards: free, 2 minutes per book, but cards get lost sometimes. System B uses a computer log: costs $150, 1 minute per book, saves all records. System C is honor system: free, 0 minutes, but no tracking. According to the information given, which solution would work best?

System A because it is free and tracks books, though it takes longer and cards can get lost.
System B because it is fastest and saves records, even though it costs $150 over $100.
System C because it takes 0 minutes, even though it does not track any books.
None of the systems work because tracking always costs more than $100.
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Elementary School Science Quiz

Elementary School Science Quiz: Selecting Best Solution

Practice Selecting Best Solution in Elementary School Science with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Selecting Best Solution, giving you a quick way to practice the rules, question types, and explanations that matter most for Elementary School Science.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

The library needs to track borrowed books. It must be reliable, quick, and under $100. System A uses paper cards: free, 2 minutes per book, but cards get lost sometimes. System B uses a computer log: costs $150, 1 minute per book, saves all records. System C is honor system: free, 0 minutes, but no tracking. According to the information given, which solution would work best?

  1. System A because it is free and tracks books, though it takes longer and cards can get lost. (correct answer)
  2. System B because it is fastest and saves records, even though it costs $150 over $100.
  3. System C because it takes 0 minutes, even though it does not track any books.
  4. None of the systems work because tracking always costs more than $100.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are reliable, quick, and under $100. Comparing the options: System A is free and tracks but slower with some loss risk; System B is reliable and quick but over budget; System C is free and quick but no tracking. Choice B is correct because System A is most promising for these reasons: it is free and tracks books, though it takes longer and cards can get lost. While not perfect in every way, it offers the best overall match to criteria. Choice C represents picks solution that fails key criterion. Students who choose this may not recognize that failing to meet reliability requirement makes a solution non-viable even if it's fast. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it meet [criterion 1]? Criterion 2? Criterion 3?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution meets all requirements but costs slightly more - is that acceptable?" Use decision-making language: "Option [X] is most promising because it meets [list criteria it meets], even though [acknowledge minor weakness]."

Question 2

A grade has 60 students going to a museum 15 miles away. They need transport under $200, reasonable travel time, and not too hard to organize. Option A: 3 school buses, costs $0, 45 minutes, set time. Option B: 15 parent cars, costs $0, 30 minutes, but hard to coordinate. Option C: 1 charter bus, costs $300, 35 minutes. Which solution offers the best balance of cost and ease?​

  1. None of the options should be used because travel always takes too long.
  2. Option C because it is comfortable and stays together, even though it costs $300.
  3. Option B because it is faster, even though coordinating 15 cars is complicated.
  4. Option A because it costs $0 and is simple to organize, though it takes 45 minutes. (correct answer)
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are under $200, reasonable travel time, and not too hard to organize. Comparing the options: Option A is free and simple but takes longer; Option B is free and faster but hard to coordinate; Option C is comfortable but over budget. Choice C is correct because Option A is most promising for these reasons: it costs $0 and is simple to organize, though it takes 45 minutes. While not perfect in every way, it offers the best overall match to criteria. Choice A represents focuses on one strength, ignores failures. Students who choose this may focus on one attractive feature without checking all criteria. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it meet [criterion 1]? Criterion 2? Criterion 3?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution meets all requirements but costs slightly more - is that acceptable?" Use decision-making language: "Option [X] is most promising because it meets [list criteria it meets], even though [acknowledge minor weakness]."

Question 3

Students want shade on hot days. The school needs shade within 1 year, under $300, and lasting at least 3 years. Idea A is a $100 tree that takes 5 years to grow. Idea B is a $200 umbrella that lasts 2-3 years. Idea C is a $400 shade sail that lasts 10 years. Which solution offers the best balance of time and cost?

  1. Idea C because it lasts 10 years, even though it costs $400 and is over $300.
  2. Idea B because it gives shade now and costs $200, though it might not last 3 years. (correct answer)
  3. Idea A because it is cheapest, even though it will not give shade within 1 year.
  4. None, because shade is not needed if students drink water.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: shade within 1 year, under $300, and lasting at least 3 years. Comparing the options: Idea A (tree) costs $100 but takes 5 years to provide shade; Idea B (umbrella) costs $200, provides immediate shade, but lasts only 2-3 years; Idea C (shade sail) costs $400, provides immediate shade, and lasts 10 years but exceeds budget. Choice B is correct because Idea B (umbrella) is most promising for these reasons: it provides shade immediately (meeting the critical "within 1 year" requirement), costs $200 which is under the $300 budget, and while its 2-3 year lifespan is borderline for the 3-year requirement, it's the only option meeting both timing and budget constraints. Choice C represents focusing on one criterion while ignoring another. Students who choose this may not recognize that failing the budget constraint by $100 (33% over) makes this solution non-viable, even though the 10-year lifespan is attractive. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it provide shade within 1 year? Is it under $300? Does it last 3+ years?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution might last only 2-3 years but provides shade now and fits budget - is that acceptable?" Use decision-making language: "Idea B is most promising because it provides immediate shade and meets budget, even though durability is borderline."

Question 4

Lost and found items are piling up. The school needs a system that is quick to use, helps people find items, and does not take too much space. Plan A: 4 labeled bins, takes 5 minutes to sort, easy to find things. Plan B: 1 big box, takes 1 minute to sort, hard to find items. Plan C: 50 hooks with a log book, takes 10 minutes per item, very organized. Which solution best meets the school's needs?

  1. Plan B because it is the quickest to sort, even though finding items is hard.
  2. Plan A because it is fairly quick and makes items easy to find, though it needs 4 bins. (correct answer)
  3. Plan C because it is very organized, even though it takes 10 minutes per item.
  4. None, because sorting lost and found should not be done at all.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The 'most promising' solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are quick to use, helps people find items, and does not take too much space. Comparing the options: Plan A uses 4 bins, takes 5 minutes, makes finding easy; Plan B uses 1 box, takes 1 minute, but finding is hard; Plan C uses 50 hooks, takes 10 minutes per item, very organized. Choice B is correct because Plan A is most promising for these reasons: at 5 minutes to sort, it's reasonably quick (not the fastest but acceptable), it makes items easy to find through labeled bins, and while 4 bins take more space than 1 box, it's still a reasonable amount of space for a school. It achieves the best balance across all criteria. Choice A represents choosing speed over functionality. Students who choose this may not recognize that a system where items are hard to find defeats the purpose of a lost and found, even if sorting is quick. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: 'Is it quick enough? Can people find their items? Does it fit in reasonable space?' Count how many criteria each solution meets. Teach that 'most promising' means 'best balance of meeting criteria,' not 'perfect in every way.' Practice accepting trade-offs: 'This system takes 4 more minutes but makes finding much easier - is that acceptable?' Use decision-making language: 'Plan A is most promising because it balances all needs: reasonably quick (5 minutes), easy finding through labels, and manageable space (4 bins).'

Question 5

A grade has 60 students going to a museum 15 miles away. They need transport under $200, with reasonable travel time, and not too hard to organize. Option A uses 3 school buses: $0 and 45 minutes, but leaves at a set time. Option B uses 15 parent cars: $0 and 30 minutes, but needs lots of coordination. Option C is 1 charter bus: $300 and 35 minutes. Which solution best meets the school's needs?

  1. Option A because it costs $0 and is simple to organize, though it takes 45 minutes. (correct answer)
  2. Option C because it is one bus, even though it costs $300 and is over $200.
  3. None, because 60 students should not go on field trips.
  4. Option B because it is fastest, even though organizing 15 drivers is complicated.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: under $200, reasonable travel time, and not too hard to organize. Comparing the options: Option A (3 school buses) costs $0, takes 45 minutes, and is simple with set departure time; Option B (15 parent cars) costs $0, takes 30 minutes, but needs complex coordination; Option C (1 charter bus) costs $300, takes 35 minutes, and is simple but exceeds budget. Choice C is correct because Option A (school buses) is most promising for these reasons: it's free (well under $200 budget), has reasonable travel time (45 minutes is acceptable for a 15-mile trip), and is simple to organize with set departure times. While it's the slowest option, this is a minor drawback compared to options that fail critical requirements. Choice A represents prioritizing speed while ignoring organizational complexity. Students who choose this may not recognize that coordinating 15 different parent drivers creates significant logistical challenges that could lead to confusion and safety issues. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Is it under $200? Is travel time reasonable? Is it simple to organize?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution takes 15 minutes longer but is free and simple - is that acceptable?" Use decision-making language: "Option A is most promising because it's free, simple to organize, and has acceptable travel time, even though it's not the fastest option."

Question 6

A school needs a bike rack for 20 bikes. Criteria: holds 20+ bikes, costs under $150, and is sturdy. Design A holds 20 bikes, costs $200, needs concrete, and is very sturdy. Design B holds 12 bikes, costs $80, bolts to a wall, and is sturdy if the wall is strong. Design C holds 20 bikes, costs $40, sits on the ground, but tips over when bumped. Which solution is most promising for solving this problem?

  1. Design C because it is under $150 and holds 20 bikes, even though it can tip over.
  2. Design A because it holds 20 bikes and is very sturdy, even though it costs $200. (correct answer)
  3. Design B because it is cheap and sturdy, even though it holds only 12 bikes.
  4. None of the designs should be chosen because each one has a problem.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The 'most promising' solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are holds 20+ bikes, costs under 150,andissturdy.Comparingtheoptions:DesignAmeetscapacity(20bikes)andsturdinessbutexceedsbudget(150, and is sturdy. Comparing the options: Design A meets capacity (20 bikes) and sturdiness but exceeds budget (200); Design B is affordable ($80) and sturdy but too small (12 bikes); Design C meets capacity and budget but fails sturdiness (tips over). Choice B is correct because Design A is most promising for these reasons: it holds the required 20 bikes and provides needed sturdiness with concrete anchoring. While the $200 cost exceeds the $150 target, it's the only option that meets the two critical safety/function requirements (capacity and sturdiness). Choice C represents focusing on budget while ignoring safety failures. Students who choose this may not recognize that a bike rack that tips over when bumped creates a safety hazard that makes it non-viable, even if it's cheap and holds enough bikes. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: 'Does it hold 20 bikes? Is it under $150? Is it sturdy?' Count how many criteria each solution meets. Teach that 'most promising' means 'best balance of meeting criteria,' not 'perfect in every way.' Practice accepting trade-offs: 'This solution meets critical safety/function requirements but costs slightly more - is that acceptable?' Use decision-making language: 'Option A is most promising because it meets capacity and sturdiness requirements, even though it exceeds budget by $50.'

Question 7

A school needs a bike rack for 20 bikes, under $150, and sturdy. Design A: holds 20, $200, concrete, very sturdy. Design B: holds 12, $80, wall bolts, sturdy if wall is strong. Design C: holds 20, $40, no install, tips over when bumped. Which design should students select, and why?

  1. Design B because it is under $150, even though it holds only 12 bikes and does not meet the 20-bike need.
  2. Design C because it is cheapest, even though it tips over and may not be sturdy enough.
  3. None of these because a good rack must meet every rule perfectly.
  4. Design A because it is very sturdy and holds 20 bikes, though it costs $200 and is over budget. (correct answer)
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are: holds 20 bikes, under $150 budget, and sturdy construction. Comparing the options: Design A holds 20 bikes and is very sturdy but costs $200 (over budget by $50); Design B costs $80 and can be sturdy but holds only 12 bikes (fails capacity); Design C holds 20 bikes and costs $40 but tips over (fails sturdiness). Choice C is correct because Design A is most promising for these reasons: it holds the required 20 bikes meeting capacity needs, provides very sturdy construction with concrete installation meeting safety requirements, and while $200 exceeds the $150 budget, it's the only option meeting both critical functional requirements. While not perfect in every way, it offers the best overall match to criteria. Choice A represents choosing budget compliance over functional requirements. Students who choose this may focus on staying under $150 without recognizing that holding only 12 bikes when 20 are needed makes the solution non-viable regardless of price. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it hold 20 bikes? Is it sturdy? Is it under $150?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This meets all functional needs but costs $50 extra - is that acceptable?" Use decision-making language: "Design A is most promising because it meets the two critical functional requirements, even though it exceeds budget."

Question 8

The library needs to track borrowed books. It must be reliable, quick, and under $100. System A uses paper cards: free, 2 minutes per book, but cards get lost sometimes. System B uses a computer log: costs $150, 1 minute per book, saves all records. System C is honor system: free, 0 minutes, but no tracking. According to the information given, which solution would work best?​

  1. System C because it takes 0 minutes, even though it does not track any books.
  2. System A because it is free and tracks books, though it takes longer and cards can get lost. (correct answer)
  3. System B because it is fastest and saves records, even though it costs $150 over $100.
  4. None of the systems work because tracking always costs more than $100.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are reliable, quick, and under $100. Comparing the options: System A is free and tracks but slower with some loss risk; System B is reliable and quick but over budget; System C is free and quick but no tracking. Choice B is correct because System A is most promising for these reasons: it is free and tracks books, though it takes longer and cards can get lost. While not perfect in every way, it offers the best overall match to criteria. Choice C represents picks solution that fails key criterion. Students who choose this may not recognize that failing to meet reliability requirement makes a solution non-viable even if it's fast. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it meet [criterion 1]? Criterion 2? Criterion 3?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution meets all requirements but costs slightly more - is that acceptable?" Use decision-making language: "Option [X] is most promising because it meets [list criteria it meets], even though [acknowledge minor weakness]."

Question 9

A class wants a pet that is active during class, easy to care for, and interactive. Option A: hamster is active in the day, eats cheap pellets, cage cleaned weekly, can be held. Option B: fish is visible all day, fed daily, tank cleaned monthly, cannot be held. Option C: hermit crab hides often, needs special food, easy care, can be held. Based on the criteria, which option should students choose?​

  1. Option C because it can be held, even though it hides often during the day.
  2. Option B because it is easy to watch all day, even though you cannot hold it.
  3. Option B because the tank is cleaned monthly, so it must be the best pet.
  4. Option A because it is active in class, easy to feed, and can be held. (correct answer)
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are being active during class, easy to care for, and interactive. Comparing the options: Option A meets activity, ease of care, and interactivity; Option B is visible but not interactive; Option C is interactive but hides often and needs special food. Choice C is correct because Option A is most promising for these reasons: it is active in class, easy to feed, and can be held. While not perfect in every way, it offers the best overall match to criteria. Choice B represents focuses on one strength, ignores failures. Students who choose this may focus on one attractive feature without checking all criteria. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it meet [criterion 1]? Criterion 2? Criterion 3?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution meets all requirements but costs slightly more - is that acceptable?" Use decision-making language: "Option [X] is most promising because it meets [list criteria it meets], even though [acknowledge minor weakness]."

Question 10

A school needs shade within 1 year, under $300, lasting 3+ years. Idea A: tree for $100 (shade in 5 years). Idea B: umbrella for $200 (shade now, lasts 2-3 years). Idea C: shade sail for $400 (shade now, lasts 10 years). Which solution offers the best balance of cost and time?

  1. Idea B because it costs $200 and gives shade now, though it may not last the full 3 years. (correct answer)
  2. Idea A because it is cheapest, even though it will not give shade within 1 year.
  3. Idea C because it lasts 10 years, even though it costs $400 and is over $300.
  4. None of these because the school should wait until it has more money.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are: shade within 1 year, under $300, and lasting 3+ years. Comparing the options: Idea A costs $100 but won't provide shade for 5 years (fails timing); Idea B costs $200, provides immediate shade, lasts 2-3 years (borderline duration); Idea C provides immediate shade for 10 years but costs $400 (fails budget). Choice C is correct because the umbrella (Idea B) is most promising for these reasons: it provides shade immediately meeting the "within 1 year" requirement, costs $200 which is under the $300 budget limit, and while it may last only 2-3 years which is borderline on the 3+ year criterion, it's the only option meeting the two most critical requirements. While not perfect in every way, it offers the best overall match to criteria. Choice A represents choosing based on price alone. Students who choose this may focus on the $100 cost without recognizing that waiting 5 years for shade completely fails the primary need for shade within 1 year. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it provide shade within 1 year? Is it under $300? Will it last 3+ years?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This provides immediate shade and fits budget but may need replacement slightly early - is that acceptable?" Use decision-making language: "Idea B is most promising because it meets timing and budget requirements, even though duration is borderline."

Question 11

60 students need a ride to a museum. Needs: under $200, not too hard to organize, and reasonable time. Option A: 3 school buses, $0, 45 minutes, leaves at set time. Option B: 15 parent cars, $0, 30 minutes, must coordinate many drivers. Option C: 1 charter bus, $300, 35 minutes, stays together. Which option would work best?

  1. Option C because it is one bus, even though it costs $300 and is over the $200 limit. (correct answer)
  2. Option A because it costs $0 and is simple to organize, though it takes 45 minutes and leaves on time.
  3. None of these because each choice has something students might not like.
  4. Option B because it is 30 minutes, even though it takes 15 cars and is hard to organize.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are: under $200 budget, not too hard to organize, and reasonable travel time. Comparing the options: Option A costs $0, takes 45 minutes, simple with set departure (meets all criteria); Option B costs $0, takes 30 minutes, but requires coordinating 15 drivers (fails organization); Option C costs $300, takes 35 minutes, stays together (fails budget). Choice B is correct because the school buses (Option A) are most promising for these reasons: completely free which meets the under $200 budget, simple to organize with just 3 buses and set departure time, and 45 minutes is reasonable for a field trip even if not the fastest. While not perfect in every way, it offers the best overall match to criteria. Choice B represents prioritizing one factor over critical constraints. Students who choose this may focus on the 30-minute travel time without recognizing that coordinating 15 parent drivers is extremely difficult and fails the "not too hard to organize" criterion. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Is it under $200? Is it manageable to organize? Is the time reasonable?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This takes 15 minutes longer but is much simpler to organize - is that acceptable?" Use decision-making language: "Option A is most promising because it meets budget, is simple to organize, and 45 minutes is reasonable, even though it's not the fastest option."

Question 12

A school needs a bike rack for 20 bikes. It must cost under $150 and be sturdy. Design A holds 20 bikes, costs $200, and is very sturdy but needs concrete. Design B holds 12 bikes, costs $80, and bolts to a wall. Design C holds 20 bikes, costs $40, but tips over when bumped. Which option should the school choose?

  1. Design B because it is under $150, even though it cannot hold 20 bikes.
  2. Design A because it is the most expensive, so it must be the best.
  3. Design C because it is cheapest, even though it is not sturdy when bumped.
  4. Design A because it holds 20 bikes and is sturdy, even though it costs over $150. (correct answer)
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: holds 20 bikes, costs under $150, and is sturdy. Comparing the options: Design A meets capacity (20 bikes) and sturdiness but costs 200(overbudget);DesignBisaffordable(200 (over budget); Design B is affordable (80) and sturdy but holds only 12 bikes; Design C meets capacity (20 bikes) and budget ($40) but tips over easily. Choice D is correct because Design A is most promising for these reasons: it holds the required 20 bikes and is very sturdy, meeting two critical safety and functionality requirements. While the $200 cost exceeds the $150 budget, this $50 overage is the only drawback compared to other options that fail essential requirements like capacity or safety. Choice C represents prioritizing low cost while ignoring safety. Students who choose this may not recognize that a bike rack that tips over when bumped is unsafe and unusable, making the low $40 cost irrelevant if bikes get damaged or students get hurt. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it hold 20 bikes? Is it under $150? Is it sturdy?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution costs $50 more but meets all safety requirements - is that acceptable?" Use decision-making language: "Design A is most promising because it meets capacity and sturdiness requirements, even though it exceeds budget by $50."

Question 13

Students want shade on the playground. The school needs shade within 1 year, under $300, and lasting at least 3 years. Idea A is planting a tree for $100, but it takes 5 years to give shade. Idea B is a big umbrella for $200 and it lasts 2-3 years. Idea C is a shade sail for $400 and it lasts 10 years. According to the information given, which solution would work best?

  1. Idea C because it lasts 10 years, even though it costs $400 and is over $300.
  2. Idea A because it costs only $100, even though it will not give shade for 5 years.
  3. Idea B because it gives shade now and costs $200, though it may not last a full 3 years. (correct answer)
  4. None, because the school should wait until the weather is cooler.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: shade within 1 year, under $300, and lasting at least 3 years. Comparing the options: Idea A (tree) costs $100 but takes 5 years for shade; Idea B (umbrella) costs $200, gives immediate shade, but lasts only 2-3 years; Idea C (shade sail) costs $400, gives immediate shade, and lasts 10 years but exceeds budget. Choice C is correct because Idea B (umbrella) is most promising for these reasons: it provides shade immediately (meeting the within 1 year requirement), costs $200 which is under the $300 budget, and while it may last only 2-3 years (borderline for the 3-year requirement), it's the only option that meets the critical timing and budget constraints. Choice A represents focusing on low cost while ignoring a critical requirement. Students who choose this may not recognize that waiting 5 years for shade completely fails the "within 1 year" criterion, making the low cost irrelevant. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it provide shade within 1 year? Is it under $300? Does it last 3+ years?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution might last only 2-3 years but meets timing and budget - is that acceptable?" Use decision-making language: "Idea B is most promising because it provides shade now and fits the budget, even though durability is borderline."

Question 14

The library needs to track borrowed books. The system should be reliable, quick, and under $100. System A uses paper cards: free, 2 minutes per book, but cards get lost sometimes. System B is a computer log: $150, 1 minute per book, saves records. System C is an honor system: free and 0 minutes, but no tracking. Which option offers the best balance of the criteria?

  1. System C because it takes 0 minutes, even though it does not track who has books.
  2. System A because it is under $100 and tracks books, though it is slower and cards can get lost. (correct answer)
  3. None, because tracking books is too hard for any system.
  4. System B because it is fastest and saves records, even though it costs $150.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: reliable tracking, quick to use, and under $100. Comparing the options: System A (paper cards) is free, takes 2 minutes, tracks books but cards get lost sometimes; System B (computer) costs $150, takes 1 minute, and saves records reliably; System C (honor system) is free, takes 0 minutes, but provides no tracking. Choice C is correct because System A is most promising for these reasons: it's free (well under $100 budget), provides tracking capability (meeting the core functional requirement), and while 2 minutes per book is slower than System B and cards can occasionally get lost, these are minor drawbacks compared to options that fail critical requirements. Choice B represents prioritizing speed and perfect reliability while ignoring budget constraints. Students who choose this may focus on the ideal features without recognizing that exceeding the budget by 50% makes this solution non-viable. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it track books reliably? Is it reasonably quick? Is it under $100?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This system has occasional card loss but meets budget and tracking needs - is that acceptable?" Use decision-making language: "System A is most promising because it tracks books, is free, and is acceptably quick, even though cards occasionally get lost."

Question 15

A class wants a pet that is active during class, easy to care for, and interactive. Option A is a hamster: active in the day, cheap food, cage cleaned weekly, can be held. Option B is a fish: seen all day, fed daily, tank cleaned monthly, cannot be held. Option C is a hermit crab: hides often, needs special food, easy care, can be held. Based on the criteria, which option should students choose?

  1. Option B because the tank is cleaned only monthly, even though you cannot hold it. (correct answer)
  2. None, because every pet needs some care and that is not fair.
  3. Option A because it is active in class and can be held, though it needs weekly cage cleaning.
  4. Option C because it can be held, even though it hides often during the day.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: active during class, easy to care for, and interactive. Comparing the options: Option A (hamster) is active during day, can be held, but needs weekly cage cleaning; Option B (fish) is visible all day but cannot be held and needs monthly tank cleaning; Option C (hermit crab) can be held but hides often during day and needs special food. Choice C is correct because Option A (hamster) is most promising for these reasons: it's active during the day when class is in session, it's interactive (can be held by students), and while weekly cage cleaning is required, this is manageable compared to special food requirements. It meets all three criteria effectively. Choice B represents prioritizing one criterion (easy care with monthly cleaning) while ignoring a critical requirement. Students who choose this may not recognize that "cannot be held" completely fails the interactive criterion, making the pet unsuitable for classroom engagement. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Is it active during class? Easy to care for? Interactive?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution requires weekly cleaning but meets all other requirements - is that acceptable?" Use decision-making language: "Option A is most promising because it meets all three criteria: active during class, interactive, and reasonably easy care, even though it needs weekly cleaning."

Question 16

Lost-and-found items are piling up. The school needs a system that is quick to use, helps find items, and does not take too much space. Plan A uses 4 labeled bins and takes 5 minutes to sort items. Plan B uses 1 big box and takes 1 minute to sort, but it is hard to find things. Plan C uses 50 hooks and a log book and takes 10 minutes per item. Which option is the best choice for this situation?

  1. Plan C because it is very organized, even though it takes 10 minutes per item.
  2. Plan C because 50 hooks means it must be the best plan.
  3. Plan B because it is the fastest to sort, even though it is hard to find items.
  4. Plan A because it helps find items and is fairly quick, though it needs 4 bins. (correct answer)
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: quick to use, helps find items, and doesn't take too much space. Comparing the options: Plan A uses 4 bins, takes 5 minutes, and helps find items; Plan B uses 1 box, takes 1 minute, but makes finding items hard; Plan C uses 50 hooks, takes 10 minutes, and is very organized but uses lots of space. Choice B is correct because Plan A is most promising for these reasons: it helps find items through labeled bins (meeting a critical functionality requirement), is reasonably quick at 5 minutes (acceptable compared to 10 minutes), and while 4 bins take some space, this is reasonable compared to 50 hooks. It balances all three criteria effectively. Choice A represents prioritizing speed over functionality. Students who choose this may not recognize that a system where items are hard to find defeats the purpose of a lost-and-found, making the 1-minute sorting time irrelevant. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Is it quick? Does it help find items? Does it use reasonable space?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution takes 5 minutes instead of 1, but helps find items - is that acceptable?" Use decision-making language: "Plan A is most promising because it helps find items, uses reasonable space (4 bins), and is acceptably quick (5 minutes), even though it's not the fastest option."

Question 17

A school needs a bike rack for 20 bikes, under $150, and sturdy. Design A: holds 20, costs $200, needs concrete, very sturdy. Design B: holds 12, costs $80, bolts to wall, sturdy if wall is strong. Design C: holds 20, costs $40, no install, tips over when bumped. Which solution is most promising?

  1. None of these because each design has at least one problem.
  2. Design A because it holds 20 bikes and is very sturdy, though it costs $200 over budget. (correct answer)
  3. Design B because it costs $80 and bolts on, even though it holds only 12 bikes.
  4. Design C because it holds 20 bikes and costs $40, even though it tips over when bumped.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are: holds 20 bikes, under $150 budget, and sturdy construction. Comparing the options: Design A holds 20 bikes and is very sturdy but costs $200 (fails budget); Design B costs $80 and is sturdy but holds only 12 bikes (fails capacity); Design C holds 20 bikes and costs $40 but tips over (fails sturdiness). Choice B is correct because Design A is most promising for these reasons: it holds the required 20 bikes (meets capacity), is very sturdy with concrete installation (meets sturdiness), and though it costs $200 which exceeds the $150 budget by $50, it's the only option that meets the two critical functional requirements. While not perfect in every way, it offers the best overall match to criteria. Choice C represents choosing based on price alone. Students who choose this may focus on the $40 cost without recognizing that a bike rack that tips over fails its basic purpose of safely holding bikes. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it hold 20 bikes? Is it sturdy? Is it under budget?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution meets all functional needs but costs slightly more - is that acceptable?" Use decision-making language: "Design A is most promising because it meets capacity and sturdiness requirements, even though it exceeds budget by $50."

Question 18

Items keep piling up in lost and found. The school wants a plan that is quick, helps people find items, and does not use too much space. Plan A uses 4 labeled bins and takes 5 minutes to sort. Plan B uses 1 big box and takes 1 minute, but items are hard to find. Plan C uses 50 hooks and takes 10 minutes per item. Which solution is most promising for solving this problem?

  1. Plan C because it is the most organized, even though it takes 10 minutes per item. (correct answer)
  2. Plan B because it uses only 1 box, even though it is hard to find items.
  3. Plan A because it is organized and still fairly quick, though it needs 4 bins.
  4. None, because lost-and-found items should be thrown away right away.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: quick to use, helps people find items, and doesn't use too much space. Comparing the options: Plan A uses 4 labeled bins, takes 5 minutes, and helps find items; Plan B uses 1 box, takes 1 minute, but items are hard to find; Plan C uses 50 hooks, takes 10 minutes per item, and is very organized but uses excessive space. Choice A is correct because Plan A is most promising for these reasons: it helps people find items through labeled bins (meeting the core functional requirement), is reasonably quick at 5 minutes, and while 4 bins take some space, this is minimal compared to 50 hooks. It achieves the best balance across all three criteria. Choice C represents over-engineering a solution. Students who choose this may think "most organized" equals "best" without considering that 10 minutes per item is impractically slow and 50 hooks use excessive space for a school setting. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Is it quick enough? Does it help find items? Does it use reasonable space?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution takes 5 minutes instead of 1, but helps find items - is that acceptable?" Use decision-making language: "Plan A is most promising because it helps find items, is reasonably quick, and uses moderate space, even though it's not the fastest option."

Question 19

A school needs a bike rack for 20 bikes. The rack should cost under $150 and be sturdy. Design A holds 20 bikes, costs $200, and is very sturdy but needs concrete. Design B holds 12 bikes, costs $80, and bolts to a wall. Design C holds 20 bikes, costs $40, and sits on the ground but tips over when bumped. Which solution is most promising for solving this problem?

  1. Design C because it is under $150 and holds 20 bikes, even though it tips over easily. (correct answer)
  2. Design A because it is very sturdy and holds 20 bikes, even though it costs $200.
  3. Design B because it is cheap and bolts to a wall, even though it only holds 12 bikes.
  4. None of the designs work because each one has at least one problem.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. In this scenario, the criteria are: holds 20 bikes, costs under 150,andissturdy.Comparingtheoptions:DesignAmeetscapacity(20bikes)andsturdinessbutexceedsbudget(150, and is sturdy. Comparing the options: Design A meets capacity (20 bikes) and sturdiness but exceeds budget (200 vs 150limit);DesignBisaffordable(150 limit); Design B is affordable (80) and sturdy but fails capacity (only 12 bikes); Design C meets capacity (20 bikes) and budget ($40) but fails sturdiness (tips over easily). Choice C is correct because Design A is most promising for these reasons: it holds the required 20 bikes and is very sturdy, meeting two critical safety/functionality requirements. While the $200 cost exceeds the $150 target by $50, this is the only minor drawback compared to other options that fail essential requirements. Choice A represents focusing on budget compliance while ignoring a critical safety failure. Students who choose this may not recognize that a bike rack that tips over easily is unsafe and unusable, making low cost irrelevant. To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it meet capacity? Budget? Sturdiness?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution meets all safety requirements but costs slightly more - is that acceptable?" Use decision-making language: "Design A is most promising because it meets capacity and sturdiness requirements, even though it exceeds budget by $50."

Question 20

A school needs shade within 1 year, under $300, lasting 3+ years. Idea A: plant 1 tree for $100 (shade in 5 years). Idea B: umbrella for $200 (shade now, lasts 2-3 years). Idea C: shade sail for $400 (shade now, lasts 10 years). Which option should students choose?

  1. None of these should be chosen because each idea has at least one problem.
  2. Idea C because it lasts 10 years, even though it costs $400 and is over $300.
  3. Idea B because it gives shade now and costs $200, even though it may not last 3 years. (correct answer)
  4. Idea A because it is only $100, even though it will not give shade within 1 year.
Explanation: This question tests selecting the most promising solution by evaluating options against criteria (NGSS 3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem). Selecting the best solution means evaluating each option against stated criteria and choosing the one that best meets most or all requirements. Often no solution is perfect - each has pros and cons. Engineers look for the solution with the best balance, meeting critical requirements even if it has minor drawbacks. The "most promising" solution isn't necessarily perfect, but it's the best available option for the situation. Selection is based on criteria match, not personal preference. In this scenario, the criteria are: shade within 1 year, under $300, and lasting 3+ years. Comparing the options: Idea A costs $100 but won't provide shade for 5 years (fails timing criterion); Idea B costs $200, provides shade immediately, but may last only 2-3 years (borderline on duration); Idea C provides immediate shade for 10 years but costs $400 (fails budget criterion). Choice A is correct because the umbrella (Idea B) is most promising for these reasons: it provides shade immediately (meets the "within 1 year" requirement), costs $200 which is under the $300 budget, and while it may last only 2-3 years (borderline on the 3+ year criterion), it's the only option that meets the two most critical requirements of immediate shade and budget. While not perfect in every way, it offers the best overall match to criteria. Choice D represents "perfection paralysis" - rejecting all solutions because none is perfect. Students who choose this may not recognize that real-world solutions often involve trade-offs and that "most promising" means "best available" not "perfect in every way." To help students: Create comparison matrix with solutions in rows and criteria in columns. Check off or score each solution against each criterion. Ask: "Does it meet the timing need? Budget limit? Duration requirement?" Count how many criteria each solution meets. Teach that "most promising" means "best balance of meeting criteria," not "perfect in every way." Practice accepting trade-offs: "This solution meets immediate need and budget but may need replacement slightly early - is that acceptable?" Use decision-making language: "Idea B is most promising because it meets timing and budget requirements, even though duration is borderline."