- Look at the test results. The class tested 3 cups to keep ice water cold for 30 minutes. Cup A had no wrap and warmed from 32°F to 55°F, and the ice melted all the way. Cup B had newspaper and warmed to 40°F, with half the ice left. Cup C had bubble wrap and warmed to 34°F, with almost all the ice left. What should students change based on what the test showed?
Answer: Use bubble wrap on the cup, because it stayed closest to 32°F and kept the most ice.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed that Cup A with no wrap warmed the most and lost all ice, while Cup C with bubble wrap stayed coldest and kept most ice. Specifically, the main problem was poor insulation leading to rapid warming and melting. Choice A is correct because it suggests using bubble wrap on the cup which directly addresses the problem found in testing: bubble wrap provides better insulation to keep the temperature low and prevent melting. This improvement is based on test evidence showing Cup C performed best, making it a targeted, evidence-based fix rather than a random change. Choice B represents suggesting an improvement for a non-problem or worsening the issue. Students who choose this may not connect test results to needed improvements and think repeating the worst performer helps 'practice' without evidence. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. The parachute took 3 seconds to fall 8 feet, but it drifted 6 feet sideways. The strings were uneven. Based on the test results, how could students improve the parachute?
Answer: Tie a knot in the shorter string to make all strings match in length.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed the parachute drifted 6 feet sideways during its fall. Specifically, the strings were uneven, causing the parachute to tilt and drift off target. Choice B is correct because it suggests tying a knot in the shorter string to make all strings match in length, which directly addresses the problem found in testing: uneven strings causing sideways drift. This improvement is based on test evidence showing uneven strings caused the drift, making it a targeted, evidence-based fix rather than a random change. Choice C represents not a design improvement. Students who choose this may confuse changing how they use the parachute with actually improving the parachute's design based on test results. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask "What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?" Emphasize connecting improvements to test evidence using "because": "We should even out the strings BECAUSE the test showed uneven strings caused drift." Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Amir made a water filter and poured in dirty water. The water came out in 20 seconds, but it still looked brown. He also saw water slip around the sides of the filter. According to the test results, which part needs to be improved?
Answer: Seal the sides and add more gravel, so water must pass through thicker layers.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed water exited quickly but remained brown, with slipping around the sides. Specifically, the main problems were poor sealing and insufficient gravel for filtering. Choice A is correct because it suggests sealing the sides and adding more gravel which directly addresses the problem found in testing: sealing prevents bypassing, and more gravel thickens the filter for cleaner water. This improvement is based on test evidence showing side leaks and brown water, making it a targeted, evidence-based fix rather than a random change. Choice D represents focusing on speed over quality, ignoring cleanliness. Students who choose this may not connect test results to the brown water issue and prioritize flow without evidence. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Water went through the filter in 20 seconds, and some dirt slipped around the sides. According to the test results, which part needs to be improved?
Answer: The sides need a tighter seal so water cannot sneak around the filter layers.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed water went through the filter in 20 seconds and some dirt slipped around the sides. Specifically, the main failure was dirt bypassing the filter by going around the edges rather than through the filter layers. Choice A is correct because it identifies that the sides need a tighter seal so water cannot sneak around the filter layers, which directly addresses the problem found in testing: dirt slipping around the sides. This improvement is based on test evidence showing side leakage allowed dirt to bypass the filter, making it a targeted, evidence-based fix rather than a random change. Choice D represents opposite of what's needed. Students who choose this may not understand that fewer layers would make filtering worse, and doesn't address the side leakage problem at all. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask "What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?" Emphasize connecting improvements to test evidence using "because": "We should seal the sides BECAUSE the test showed dirt went around them." Practice distinguishing major failures (fix first) from minor issues.
- Look at the test results. Maya built a self-watering plant system with a bottle. System A drained all the water in 2 hours and made the soil muddy. System B had no water after 4 hours because the hole was clogged. System C dripped slowly for 2 days and kept soil moist. Based on the test results, how could students improve System A?
Answer: Make the hole smaller or add a tiny drip hole, so water does not drain in 2 hours.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed System A drained too quickly in 2 hours, making soil muddy, while System C dripped slowly and worked well. Specifically, the main problem was the hole allowing water to drain too fast. Choice A is correct because it suggests making the hole smaller or adding a tiny drip hole which directly addresses the problem found in testing: this slows drainage to prevent muddiness and overwatering. This improvement is based on test evidence showing rapid drainage caused issues, making it a targeted, evidence-based fix rather than a random change. Choice B represents the opposite of what's needed by speeding up drainage. Students who choose this may not connect test results to the muddiness problem and think faster is always better. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Look at the test results. In a plant watering test, System A drained in 2 hours and made mud, System B gave no water in 4 hours, and System C dripped for 2 days. Which improvement would solve the problem found in the test?
Answer: Change the hole size to drip slowly like System C, not too fast or clogged.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed System A drained too fast in 2 hours making mud, System B was clogged giving no water, and System C dripped slowly for 2 days. Specifically, the hole size determined water flow rate, with System C's slow drip being ideal for plant watering. Choice B is correct because it suggests changing the hole size to drip slowly like System C, which directly addresses the problems found in testing: too fast drainage causing mud or no drainage from clogging. This improvement is based on test evidence showing System C's slow drip worked best, making it a targeted, evidence-based fix rather than a random change. Choice A represents opposite of what's needed. Students who choose this may not understand that System A already drained too fast, and making the hole bigger would worsen the mud problem. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask "What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?" Emphasize connecting improvements to test evidence using "because": "We should make holes like System C BECAUSE the test showed slow dripping worked best." Practice distinguishing major failures (fix first) from minor issues.
- Look at the test results. Yuki tested 3 cups of ice water for 30 minutes. Cup A went from 32°F to 55°F and the ice melted all the way. Cup B with newspaper went to 40°F and kept half the ice. Cup C with bubble wrap went to 34°F and kept almost all the ice. The test showed a problem. How could students fix it for Cup A?
Answer: Wrap Cup A with bubble wrap, because it kept the coldest temperature in the test.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed Cup A warmed rapidly and lost all ice, while Cup C with bubble wrap stayed coldest. Specifically, the main problem was inadequate insulation in Cup A. Choice A is correct because it suggests wrapping Cup A with bubble wrap which directly addresses the problem found in testing: bubble wrap insulates better to maintain cold temperatures. This improvement is based on test evidence showing bubble wrap performed best, making it a targeted, evidence-based fix rather than a random change. Choice B represents suggesting an unrelated or harmful change like sun exposure. Students who choose this may ignore test data and think external factors unrelated to insulation help without evidence. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Look at the test results. After 30 minutes, Cup A warmed to 55°F, Cup B to 40°F, and Cup C to 34°F. What should students change based on what the test showed?
Answer: Use bubble wrap like Cup C, because it kept the water coldest at 34°F.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed different insulation materials kept ice water at different temperatures after 30 minutes. Specifically, Cup C with bubble wrap kept water coldest at 34°F, while Cup A warmed to 55°F and Cup B to 40°F. Choice A is correct because it suggests using bubble wrap like Cup C, which directly addresses the goal based on testing: keeping water cold. This improvement is based on test evidence showing bubble wrap performed best at maintaining cold temperature, making it a targeted, evidence-based fix rather than a random change. Choice B represents misunderstanding the goal. Students who choose this may think warmer is better, not understanding that good insulation keeps cold things cold by preventing heat from entering. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask "What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?" Emphasize connecting improvements to test evidence using "because": "We should use bubble wrap BECAUSE the test showed it kept water coldest." Practice distinguishing major failures (fix first) from minor issues.
- Look at the test results. Jamal built a paper bridge to hold pennies. Bridge A held 15 pennies before it collapsed. The middle sagged first, then the paper tore where it was folded. The test showed the middle needs more support and folds are weak spots. Which improvement would solve the problem found in the test?
Answer: Add a support strip under the middle and tape the folded parts, because those spots sagged and tore.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed the bridge held 15 pennies but the middle sagged first and tore at folds. Specifically, the main failure points were the weak middle and folded areas. Choice A is correct because it suggests adding a support strip under the middle and taping the folded parts which directly addresses the problem found in testing: this strengthens the sagging middle and weak folds. This improvement is based on test evidence showing sagging and tearing at those spots, making it a targeted, evidence-based fix rather than a random change. Choice B represents suggesting an improvement for a non-problem like length instead of strength. Students who choose this may try to fix something that worked fine and not connect test results to needed improvements. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Look at the test results. Keisha tested a parachute made from a plastic bag. It fell from 8 feet in 3 seconds and landed 6 feet away from the target. The class saw one string was shorter than the others, and it drifted sideways. Which improvement would solve the problem found in the test?
Answer: Make all the strings the same length, so the parachute does not drift sideways.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed the parachute fell in 3 seconds but drifted sideways 6 feet away due to one shorter string. Specifically, the uneven strings caused the drift. Choice B is correct because it suggests making all strings the same length which directly addresses the problem found in testing: equal lengths prevent sideways drifting. This improvement is based on test evidence showing the shorter string caused drift, making it a targeted, evidence-based fix rather than a random change. Choice A represents suggesting an unrelated or counterproductive change like size for speed. Students who choose this may think any change is an improvement without checking test data on drift. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Carlos tested 3 marble ramps. Ramp A rolled 18 inches but the marble fell off the side halfway down. Ramp B stayed on the ramp but only rolled 10 inches because it was too flat. Ramp C rolled 25 inches and stayed on track. What should students change based on what the test showed for Ramp A?
Answer: Add side walls or rails, because the marble fell off the side during the test.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed Ramp A rolled far but the marble fell off the side halfway. Specifically, the main problem was lack of containment on the sides. Choice A is correct because it suggests adding side walls or rails which directly addresses the problem found in testing: this keeps the marble on track during rolling. This improvement is based on test evidence showing the marble fell off the side, making it a targeted, evidence-based fix rather than a random change. Choice B represents suggesting an improvement that could worsen distance without fixing the fall-off. Students who choose this may focus on one aspect like flatness but ignore the test data on side falls. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Marcus made a paper bridge from one sheet of paper. It held 15 pennies, then collapsed. The middle sagged first, and the tear started at a folded line. Based on the test results, how could students improve the paper bridge?
Answer: Reinforce the middle with another paper strip, and tape the fold lines where it tore.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed the bridge held 15 pennies but sagged in the middle first and tore at a fold line. Specifically, the main failure points were the weak middle and fold lines. Choice A is correct because it suggests reinforcing the middle with another paper strip and taping the fold lines which directly addresses the problem found in testing: this adds strength to the sagging area and weak folds. This improvement is based on test evidence showing sagging and tearing there, making it a targeted, evidence-based fix rather than a random change. Choice C represents a misconception about folds, suggesting fewer when more targeted reinforcement is needed. Students who choose this may not connect test results to specific weaknesses and assume general rules without evidence. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. What change would slow the parachute's fall from 8 feet?
Answer: Use a bigger plastic bag canopy so it catches more air and falls slower.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. In this scenario, the test showed the parachute falling too quickly from 8 feet, not slowing enough. Choice A is correct because it suggests using a bigger plastic bag canopy which directly addresses the problem found in testing: this fix targets the specific failure point of fast descent. Choice B represents suggesting the opposite of what's needed. Students who choose this may think faster fall is better without checking test data. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Bubble wrap kept ice almost frozen at 34°F after 30 minutes, better than newspaper at 40°F. Based on the test results, how could students improve their insulated cup?
Answer: Use bubble wrap and cover the whole cup, since it kept the coldest temperature.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed bubble wrap kept ice almost frozen at 34°F after 30 minutes, better than newspaper at 40°F. Specifically, bubble wrap was the most effective insulator for keeping ice cold. Choice B is correct because it suggests using bubble wrap and covering the whole cup, which directly addresses the goal based on testing: maximizing insulation to keep ice cold. This improvement is based on test evidence showing bubble wrap performed best, and suggests complete coverage for even better results, making it a targeted, evidence-based fix rather than a random change. Choice A represents misunderstanding test results. Students who choose this may confuse warmer temperature with better performance, not understanding that for keeping ice cold, lower temperature means better insulation. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask "What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?" Emphasize connecting improvements to test evidence using "because": "We should use bubble wrap and cover completely BECAUSE the test showed it kept ice coldest." Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Sofia tested a parachute made from a plastic bag. It dropped from 8 feet in 3 seconds, but it drifted sideways and landed 6 feet from the target. She noticed one string was shorter than the others. Based on the test results, how could students improve the parachute?
Answer: Make all the strings the same length, so it falls straight to the target.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed the parachute drifted sideways and landed far from the target due to one shorter string. Specifically, the uneven strings caused the sideways drift. Choice B is correct because it suggests making all strings the same length which directly addresses the problem found in testing: equal strings prevent drifting and help it fall straight. This improvement is based on test evidence showing the shorter string caused the issue, making it a targeted, evidence-based fix rather than a random change. Choice A represents the opposite of what's needed by making the problem worse. Students who choose this may think any change to speed is an improvement without checking test data on the drift cause. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Bridge A collapsed at 15 pennies when the middle sagged first. Which improvement would solve the problem found in the test?
Answer: Reinforce the middle with an extra paper strip because that is where it sagged first.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed that Bridge A collapsed at 15 pennies when the middle sagged first. Specifically, the middle was the first part to fail, indicating it was the weakest section of the bridge. Choice A is correct because it suggests reinforcing the middle with an extra paper strip, which directly addresses the problem found in testing: the middle sagging first. This improvement is based on test evidence showing the middle was the initial failure point, making it a targeted, evidence-based fix rather than a random change. Choice D represents opposite of what's needed. Students who choose this may not understand that removing supports would make the sagging problem worse, not better. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask "What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?" Emphasize connecting improvements to test evidence using "because": "We should reinforce the middle BECAUSE the test showed it sagged first." Practice distinguishing major failures (fix first) from minor issues.
- Look at the test results. A parachute fell from 8 feet in 3 seconds and landed 6 feet from the target. One string was shorter. What change would make the parachute work better?
Answer: Make all the strings the same length so it falls straight toward the target.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed the parachute fell from 8 feet in 3 seconds but landed 6 feet from the target. Specifically, one string was shorter, causing uneven suspension and sideways drift. Choice A is correct because it suggests making all strings the same length so it falls straight toward the target, which directly addresses the problem found in testing: uneven strings causing drift. This improvement is based on test evidence showing one shorter string caused sideways movement, making it a targeted, evidence-based fix rather than a random change. Choice B represents opposite of what's needed. Students who choose this may not understand that making strings more uneven would worsen the drift problem, not fix it. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask "What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?" Emphasize connecting improvements to test evidence using "because": "We should make strings equal BECAUSE the test showed uneven strings caused drift." Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Chen made a water filter with a cup, cloth, and gravel. Dirty water flowed through in 20 seconds, but the water still looked brown. He also saw some dirt go around the sides instead of through the filter. What change would make the filter work better?
Answer: Pour the water faster, so the filter has less time to get dirty.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed water flowed through in 20 seconds but remained brown, with some dirt bypassing around the sides. Specifically, the main problems were insufficient filtering and leaks around the sides. Choice A is correct because it suggests making the gravel layer thicker and sealing the sides which directly addresses the problem found in testing: thicker gravel improves filtering, and sealing prevents bypassing. This improvement is based on test evidence showing brown water and side leaks, making it a targeted, evidence-based fix rather than a random change. Choice C represents the opposite of what's needed by reducing gravel. Students who choose this may think speed is more important than cleanliness without connecting to test data on brown water. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. What change would make the parachute land closer to the target?
Answer: Make all the strings the same length so it drifts less sideways.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. In this scenario, the test showed the parachute drifting sideways due to uneven string lengths, missing the target. Choice A is correct because it suggests making all the strings the same length which directly addresses the problem found in testing: this fix targets the specific failure point of sideways drift. Choice B represents suggesting improvement that worsens the problem. Students who choose this may think faster fall fixes accuracy without checking test data. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask 'What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?' Emphasize connecting improvements to test evidence using 'because': 'We should [improvement] BECAUSE the test showed [problem].' Practice distinguishing major failures (fix first) from minor issues.
- Read about what happened during the test. Ramp A rolled 18 inches but fell off, Ramp B stayed on but rolled 10 inches, and Ramp C rolled 25 inches and stayed on. Based on the test results, how can students use the results to make the design better?
Answer: Add sides like Ramp C and make it a bit steeper, so it stays on and rolls far.
This question tests using test results to suggest improvements (NGSS 3-5-ETS1-3: Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved). Testing reveals what works and what doesn't work in a design. When tests show problems or failures, engineers use that information to make specific improvements. The key is matching the improvement to the problem found in the test - if the middle sagged, strengthen the middle; if strings were uneven causing drift, make strings equal. Good improvements are based on evidence from tests, not random changes or complete redesigns. In this scenario, the test showed Ramp A rolled 18 inches but marble fell off, Ramp B stayed on but only rolled 10 inches, and Ramp C rolled 25 inches and stayed on. Specifically, Ramp C combined the best features: sides to keep the marble on track and good steepness for distance. Choice C is correct because it suggests adding sides like Ramp C and making it a bit steeper, which directly addresses both problems found in testing: falling off (solved by sides) and short distance (solved by steepness). This improvement is based on test evidence showing Ramp C's combination worked best, making it a targeted, evidence-based fix rather than a random change. Choice A represents fixing non-problem while creating new problem. Students who choose this may focus only on distance without considering that Ramp A's marble falling off was a major failure that needs fixing first. To help students: Create two-column chart: What the test showed (problems) | How to fix it (improvements). Ask "What went wrong in the test? Where did it break/fail/not work? How could we fix that specific problem?" Emphasize connecting improvements to test evidence using "because": "We should add sides and adjust steepness BECAUSE the test showed this combination worked best." Practice distinguishing major failures (fix first) from minor issues.
