- Emma's notebook entry says: Question—"What happens when we mix 1 tbsp baking soda with 30 mL lemon juice?" Prediction—"I think it will get fizzy." Procedure: 1) Mix the substances in a cup. 2) Clean up the table. 3) Record what happened.
Which step should come right after mixing the substances to follow a good procedure order?
Answer: Observe and record changes like bubbles and temperature before cleaning up.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically the logical order in procedures. When planning a mixing investigation, students need to include clear questions, gather appropriate materials, follow safety rules, observe before and after, and record systematically. For this question, the specific context is investigating what happens when mixing baking soda and lemon juice. Choice B is correct because it follows a logical order of observe-mix-observe-record by noting changes like bubbles and temperature right after mixing. This shows the student understands that before/after comparison shows change and recording should happen before cleanup. Choice A represents a common error where students clean up first, potentially missing key observations during the reaction. This typically happens because elementary students may prioritize tidiness over systematic observation, thinking they can remember without immediate recording. To help students: Model planning with a checklist for procedure order, like mix-observe-record-clean, using examples like fizzy reactions. Watch for: Students who try to conclude before observing fully, jumping to cleanup and losing evidence of changes.
- To investigate whether mixing oil and water makes a mixture that stays mixed, Carlos wrote this procedure: 1) Pour 1/2 cup water into a clear jar. 2) Add 2 tbsp oil and put the lid on tightly. 3) Shake for 10 seconds and observe. Which measurement should Carlos record to best answer his question?
Answer: How long it takes for the oil and water to separate into two layers after shaking.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically recording. When planning a mixing investigation, students need to record systematically. For this question, investigating whether oil and water stay mixed. Choice A is correct because it follows logical order of observe-mix-observe-record by measuring separation time. This shows the student understands recording creates evidence. Choice C represents a common error where students suggest tasting, ignoring safety. This typically happens because elementary students may prioritize excitement of mixing over safety. To help students: Emphasize that science is observing what actually happens, not proving we're right. Watch for: Students who think conclusion should match prediction.
- The investigation plan shows Maya mixing 1 tbsp salt with 1/2 cup water to see how fast salt dissolves. Materials listed: salt, water, 3 clear cups, 1 tsp spoon, timer, tray. Safety: No tasting and wash hands. Procedure: 1) Put 1/2 cup water in each cup. 2) Add 1 tbsp salt and stir 10 times. 3) Write what you see after 30 seconds. What is missing that would make this a fair test for "how fast" the salt dissolves?
Answer: Students should record the time it takes until the salt is no longer visible in each cup.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically procedure. When planning a mixing investigation, students need to follow logical order of observe-mix-observe-record. For this question, comparing salt dissolving. Choice C is correct because it includes recording time for dissolving, making it a fair test for speed. This shows the student understands proper procedure enables observations. Choice B represents a common error where students suggest tasting to check, forgetting safety. This typically happens because elementary students may not yet understand importance of baseline observations. To help students: Model planning with simple investigation like sugar in water before complex ones. Watch for: Students who observe but don't record systematically.
- Emma is investigating: "Does mixing food coloring with water make a new substance?" She will put 1 cup water in a clear cup and add 3 drops of blue food coloring. Which measurement will help Emma make a fair test if she repeats the investigation?
Answer: Emma should measure 1 cup of water and count 3 drops each time.
This question tests 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically maintaining consistent measurements for fair testing. When planning a mixing investigation, students need to keep all measurements the same across trials - using the same amounts ensures that any differences in results come from the variable being tested, not from using different quantities. For this question, Emma needs consistent measurements to make valid comparisons if she repeats her investigation. Choice B is correct because it specifies exact, consistent measurements (1 cup water, 3 drops food coloring) that can be replicated each time, ensuring fair testing conditions. This shows the student understands that scientific investigations require precision and consistency. Choice A represents a common error where students think approximate amounts are sufficient, using 'any amount' and 'guessing.' This typically happens because elementary students may not yet appreciate how varying amounts can affect results, making it impossible to draw valid conclusions. To help students: Practice using measuring tools and recording exact amounts, emphasizing that 'about' or 'some' aren't scientific measurements - use measurement practice with water and droppers before investigations. Watch for: Students who resist precise measurement because it seems unnecessary or who change amounts to make investigations 'more interesting' without realizing this invalidates comparisons.
- To investigate whether mixing baking soda and lemon juice causes a change, Amir wrote: Materials—baking soda, lemon juice, cup, spoon. Procedure: 1) Pour lemon juice into the cup. 2) Add baking soda. 3) Watch what happens. Which safety rule is most important to add for this investigation?
Answer: Wear goggles because the mixture can fizz and splash into eyes.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically safety. When planning a mixing investigation, students need to follow safety rules. For this question, investigating baking soda and lemon juice reaction. Choice A is correct because it includes safety equipment like goggles for fizzing. This shows the student understands safety prevents harm. Choice B represents a common error where students suggest tasting, skipping safety. This typically happens because elementary students may prioritize excitement of mixing over safety. To help students: Emphasize that science is observing what actually happens, not proving we're right. Watch for: Students who underestimate importance of safety rules.
- Yuki wants to find out whether baking soda reacts more with vinegar or with water. She has three clear cups labeled A, B, and C. Cup A: 30 mL vinegar. Cup B: 30 mL water. Cup C: empty. She will add 1 tsp baking soda to Cup A and 1 tsp baking soda to Cup B. Why is Cup B important in this investigation?
Answer: Cup B is a comparison that shows what happens when baking soda is mixed with water.
This question tests 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically understanding the role of comparison/control in investigations. When planning a mixing investigation, students need to include comparisons that help them understand which substance causes the observed effect - in this case, whether baking soda reacts differently with vinegar versus water. For this question, Yuki needs to determine if the reaction is specific to vinegar or happens with any liquid. Choice B is correct because it identifies Cup B as a comparison (control) that shows what happens when baking soda meets water instead of vinegar, allowing Yuki to determine which liquid causes more reaction. This shows the student understands that scientific investigations often need comparisons to draw valid conclusions. Choice A represents a common error where students think about taste changes rather than observable reactions. This typically happens because elementary students may not yet understand that controls help isolate variables - they might think all cups need different purposes rather than serving as comparisons. To help students: Use the language 'comparison cup' or 'control cup' and explicitly teach that these help us see what causes changes by testing one thing at a time. Watch for: Students who don't understand why we need multiple setups or who think every container must have a completely different purpose.
- Students want to find out if mixing baking soda and vinegar creates a new substance. Amir's plan says: Purpose—see what happens when 1 tbsp baking soda is mixed with 30 mL vinegar in a clear cup. Safety—wear goggles, no tasting, and work on a tray. Procedure—(1) Observe each substance before mixing. (2) Mix and watch for bubbles and temperature change. (3) Record observations in a data table and clean up. Which observation would provide the best evidence that a new substance formed?
Answer: Students should record that bubbles of gas form right after mixing and the mixture gets foamy.
This question tests 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically identifying observations that provide evidence of chemical change. When planning a mixing investigation, students need to recognize that new substances form when we observe signs like gas production, temperature change, color change, or precipitate formation. For this question, mixing baking soda and vinegar creates carbon dioxide gas, which appears as bubbles and foam. Choice B is correct because it identifies the key observable evidence of a chemical reaction - the formation of gas bubbles and foam that weren't present in either original substance. This shows the student understands that new substances have different properties than the starting materials. Choice A represents a common error where students focus on properties that don't change (the vinegar still smells sour) rather than looking for new properties that appear. This typically happens because elementary students may not yet distinguish between physical properties that persist and new properties that indicate chemical change. To help students: Model identifying evidence of chemical change by having them list properties before and after mixing, then circle any NEW properties that appear. Watch for: Students who think any observation counts as evidence rather than focusing on changes that indicate new substance formation.
- The materials list includes: warm water (about 40°C), yeast, sugar, 3 small bottles, balloons, 1 tsp spoon, and a tray. Students want to find out: "Does adding sugar change how much gas yeast makes?" Which setup best matches this question?
Answer: Put yeast and warm water in all bottles, and add sugar to only one bottle.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically purpose. When planning a mixing investigation, students need to include clear question. For this question, investigating whether adding sugar changes gas from yeast. Choice A is correct because it identifies the clear testable question by varying sugar while keeping yeast constant. This shows the student understands investigations need clear purpose. Choice C represents a common error where students vary everything, missing controlled variables. This typically happens because elementary students may not connect materials to specific observations needed. To help students: Practice identifying what makes a good testable question. Watch for: Students who jump to mixing without planning.
- Chen wants a fair test to compare how fast sugar dissolves in cold water versus warm water. He plans to use two clear cups, 1/2 cup water in each, and 1 tsp sugar in each.
Which action best keeps the test fair?
Answer: Keep the amount of sugar and the amount of water the same in both cups.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically fair testing in procedures. When planning a mixing investigation, students need to include clear questions, gather appropriate materials, follow safety rules, observe before and after, and record systematically. For this question, the specific context is comparing sugar dissolving in cold versus warm water. Choice C is correct because it keeps variables like amounts of sugar and water the same, ensuring a fair comparison of temperature's effect. This shows the student understands that proper materials and consistent procedures enable accurate observations of differences. Choice B represents a common error where students vary stirring times, making the test unfair by changing multiple factors. This typically happens because elementary students may not yet understand the importance of controlling variables, thinking more stirring always helps without considering fairness. To help students: Practice identifying what makes a good testable question and model fair tests with checklists for 'what stays the same' versus 'what changes.' Watch for: Students who think conclusion should match prediction, adjusting procedures unfairly to 'prove' they're right.
- The materials list includes salt, water, a spoon, a clear cup, and a timer. Marcus wants to find out: "Does salt disappear when I mix it with water, or is it still there?" What is the main purpose of this investigation?
Answer: To find out if salt dissolves in water and can no longer be seen.
This question tests 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically identifying a clear, testable purpose for an investigation. When planning a mixing investigation, students need to start with a focused question about what happens when substances are combined - in this case, whether salt still exists after dissolving or truly disappears. For this question, Marcus wants to investigate whether dissolved salt is still present even though it can't be seen. Choice A is correct because it clearly states the investigation's purpose: to find out if salt dissolves and becomes invisible while still being present in the water. This shows the student understands that good investigations start with specific, observable questions about mixing outcomes. Choice B represents a common error where students confuse different types of mixing reactions - salt dissolving is different from gas-producing reactions like carbonation. This typically happens because elementary students may group all mixing as the same phenomenon without distinguishing between dissolving, chemical reactions, and physical mixing. To help students: Practice writing investigation purposes using the format 'To find out if/what happens when...' and ensure the purpose matches the materials listed. Watch for: Students who write purposes that can't be answered with their materials or who confuse different types of substance interactions.
- Jamal's investigation plan shows this question: "What happens when I mix baking soda with lemon juice?" Materials: baking soda, lemon juice, clear cup, teaspoon, thermometer, tray, goggles. Procedure: (1) Pour 30 mL lemon juice into the cup and record the temperature. (2) Add 1 tsp baking soda and stir. (3) Record what you see and the temperature after 1 minute. Which part of Jamal's plan best helps him measure a temperature change?
Answer: Using a thermometer and recording the temperature before and after mixing.
This question tests 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically using appropriate tools to measure specific changes. When planning a mixing investigation, students need to select and use tools that measure the property they're investigating - for temperature change, this means using a thermometer and recording readings at specific times. For this question, Jamal wants to detect temperature change when mixing baking soda with lemon juice. Choice C is correct because it identifies both the tool (thermometer) and the procedure (recording temperature before and after) needed to measure temperature change quantitatively. This shows the student understands that measuring change requires taking readings at multiple time points with appropriate instruments. Choice B represents a safety measure (goggles) which is important but doesn't help measure temperature change. This typically happens because elementary students may confuse general good practices with specific measurement needs. To help students: Match investigation questions to measurement tools using a chart - 'If you want to measure temperature → use thermometer,' 'If you want to measure volume → use measuring cup,' etc. Watch for: Students who include the right tools in materials but don't specify how to use them in the procedure to actually measure changes.
- The materials list includes vinegar, baking soda, a clear cup, a tray, a thermometer, and goggles. Students will pour 30 mL vinegar into the cup and add 1 tbsp baking soda.
Which safety rule is most important for this investigation?
Answer: Wear goggles, because the mixture can bubble and splash into eyes.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically safety precautions. When planning a mixing investigation, students need to include clear questions, gather appropriate materials, follow safety rules, observe before and after, and record systematically. For this question, the specific context is investigating baking soda and vinegar, which can produce bubbling reactions. Choice A is correct because it includes safety equipment like goggles to protect eyes from splashes during bubbling. This shows the student understands that safety prevents harm in reactions that might fizz or splash. Choice C represents a common error where students suggest tasting because ingredients like vinegar are food-related, ignoring potential risks. This typically happens because elementary students may underestimate importance of safety rules and think familiar items are always safe to taste. To help students: Use an investigation checklist that highlights safety first, and demonstrate why goggles are needed with a safe demo of bubbling. Watch for: Students who prioritize excitement of mixing over safety, such as holding cups too close without protection.
- Students want to find out what happens when sand is mixed with water. Their plan includes a data table with columns "Before Mixing," "During Mixing," and "After Mixing." What should they record in the "Before Mixing" column?
Answer: What the sand and water look like separately, including color and texture.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically recording. When planning a mixing investigation, students need to record systematically. For this question, comparing sand settling. Choice B is correct because it recognizes need to observe color and texture before mixing. This shows the student understands before/after comparison shows change. Choice A represents a common error where students skip to conclusion without observations. This typically happens because elementary students may think they can remember without recording. To help students: Model planning with simple investigation like sugar in water before complex ones. Watch for: Students who observe but don't record systematically.
- To investigate whether mixing creates a new substance, Maya mixes yeast, sugar, and warm water. Her steps are: 1) Mix 1 tsp yeast, 1 tsp sugar, and 1/2 cup warm water in a clear cup. 2) Watch for 10 minutes. 3) Write down what happens.
What should Maya do first to make her investigation plan stronger?
Answer: She should observe and record what each substance looks like before mixing.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically the procedure for baseline observations. When planning a mixing investigation, students need to include clear questions, gather appropriate materials, follow safety rules, observe before and after, and record systematically. For this question, the specific context is investigating whether mixing yeast, sugar, and water creates a new substance through changes like bubbling. Choice B is correct because it follows a logical order of observe-mix-observe-record by starting with recording appearances before mixing for comparison. This shows the student understands that before/after comparison shows change and provides evidence of reactions. Choice D represents a common error where students suggest tasting the mixture to check properties like sweetness, skipping safety precautions. This typically happens because elementary students may prioritize excitement of mixing over safety and not yet understand that tasting can introduce risks or bias observations. To help students: Model planning with simple investigations like sugar in water before complex ones, emphasizing the step of 'observe before mixing' to establish a baseline. Watch for: Students who jump to mixing without planning, as they might forget to record initial states and lose the ability to compare changes.
- The investigation plan shows Fatima mixing sand and water to see if sand dissolves. She will use 1/2 cup water and 2 tbsp sand in a clear jar.
Which data table header set would best help Fatima record observations in an organized way?
Answer: "Before Mixing" / "During Mixing" / "After Mixing"
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically recording observations in an organized way. When planning a mixing investigation, students need to include clear questions, gather appropriate materials, follow safety rules, observe before and after, and record systematically. For this question, the specific context is investigating whether sand dissolves in water, focusing on data table organization. Choice B is correct because it uses headers like Before, During, and After Mixing to structure observations chronologically. This shows the student understands that recording creates evidence and helps track changes over time. Choice A represents a common error where students include unrelated personal details like favorite color, missing the focus on scientific observations. This typically happens because elementary students may not connect materials to specific observations needed, blending science with everyday interests. To help students: Emphasize that science is observing what actually happens, not proving we're right, and provide template data tables for mixes like sand in water. Watch for: Students who observe but don't record systematically, such as jotting random notes without structure.
- To investigate whether oil and water mix, Sofia plans to pour 1/2 cup water and 1/2 cup oil into a clear jar and shake it. She will watch what happens for 2 minutes. Which safety rule is most important for this investigation?
Answer: Students should wear goggles in case the jar splashes while shaking.
This question tests 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically following appropriate safety rules during hands-on investigations. When planning a mixing investigation, students need to identify potential hazards and take precautions - even with everyday materials like oil and water, vigorous shaking can cause splashing. For this question, shaking a jar of liquids creates splash risk that could get in eyes. Choice B is correct because it identifies the specific safety equipment (goggles) needed to protect against the main hazard (splashing during shaking). This shows the student understands that safety planning means matching protective equipment to specific investigation risks. Choice A represents a common error where students suggest tasting unknown mixtures, violating the fundamental 'no tasting' rule in science investigations. This typically happens because elementary students may not yet internalize that science uses observation tools, not taste, and that even familiar substances shouldn't be tasted during investigations. To help students: Create a safety checklist that includes 'wear goggles for any splashing risk' and 'never taste in science investigations' as non-negotiable rules. Watch for: Students who think safety rules only apply to 'dangerous' chemicals rather than understanding that all investigations need appropriate precautions.
- Students want to find out how food coloring spreads in water. Their procedure is: 1) Put 1/2 cup water in a clear cup. 2) Add 2 drops of food coloring. 3) Observe for 2 minutes and record changes.
Which measurement should students record to make their observations more accurate and consistent?
Answer: Record the time (in seconds) it takes for the color to spread across the cup.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically accurate and consistent observations. When planning a mixing investigation, students need to include clear questions, gather appropriate materials, follow safety rules, observe before and after, and record systematically. For this question, the specific context is investigating how food coloring spreads in water. Choice A is correct because it measures time for color spreading, providing quantifiable data for consistency. This shows the student understands that recording creates evidence through measurable changes like time. Choice B represents a common error where students record opinions like liking the color with smiley faces, confusing subjective feelings with objective observations. This typically happens because elementary students may think personal preferences are part of science, not yet distinguishing between facts and opinions. To help students: Model planning with simple investigations like food coloring in water, using timers to practice measuring changes. Watch for: Students who think conclusion should match prediction, recording only what supports their guess instead of actual times.
- Students want to find out if mixing baking soda and vinegar makes something new. Their plan says: Purpose—watch for bubbles (gas) and temperature change. Materials—baking soda, vinegar, 2 clear cups, 1 tsp spoon, thermometer, tray, paper towels. Safety—Wear goggles, no tasting, wash hands after. Procedure: 1) Measure 2 tbsp vinegar into a cup and record its temperature. 2) Add 1 tsp baking soda and stir. 3) Record bubbles and temperature for 1 minute. What observation would provide the best evidence that a new substance formed?
Answer: Students should check whether bubbles form and whether the mixture gets cooler or warmer.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically observations. When planning a mixing investigation, students need to observe before and after to detect changes like gas production or temperature shifts that indicate a new substance. For this question, investigating whether baking soda and vinegar create new substance. Choice B is correct because it recognizes the need to observe bubbles and temperature changes. This shows the student understands before/after comparison shows change. Choice A represents a common error where students suggest tasting to observe, skipping safety rules. This typically happens because elementary students may prioritize excitement of mixing over safety. To help students: Use investigation checklist (question-materials-safety-procedure-recording). Watch for: Students who underestimate importance of safety rules.
- Fatima is testing a prediction about yeast: "If I mix yeast, sugar, and warm water, I think it will make bubbles." Her steps are: (1) Mix 1 tsp yeast, 1 tsp sugar, and 1/2 cup warm water in a bottle. (2) Put a balloon over the bottle opening. (3) Wait 10 minutes and observe. What should Fatima do first to make the investigation more careful?
Answer: Fatima should observe and record what the yeast, sugar, and water are like before mixing.
This question tests 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically the importance of baseline observations before mixing. When planning a mixing investigation, students need to observe and record the properties of each substance before combining them - this provides the 'before' data needed to identify changes. For this question, Fatima jumps straight to mixing without documenting initial properties of yeast, sugar, and water. Choice A is correct because it identifies the need to observe and record what each substance looks like before mixing - establishing baseline data about color, texture, and state. This shows the student understands that detecting change requires knowing the starting conditions. Choice C represents a common error where students suggest tasting the mixture to gather data. This typically happens because elementary students may not have internalized the 'no tasting' safety rule or may think taste is necessary to detect sugar presence. To help students: Create investigation templates that always start with 'Observe each material before mixing' as step one, emphasizing that we can't identify changes without knowing starting properties. Watch for: Students who are eager to see reactions and skip initial observations, missing crucial baseline data needed for comparison.
- Students want to find out whether oil and water mix together. Jamal sets up three cups: Cup 1 has 1/2 cup water only, Cup 2 has 1/2 cup oil only, and Cup 3 has 1/2 cup water + 1/2 cup oil.
Why is Cup 1 (water only) helpful in this investigation?
Answer: It is a comparison cup, so students can see what water looks like without oil mixed in.
This question tests a 5th grader's ability to plan and carry out investigations that mix substances (NGSS 5-PS1-4), specifically the purpose of control setups in comparisons. When planning a mixing investigation, students need to include clear questions, gather appropriate materials, follow safety rules, observe before and after, and record systematically. For this question, the specific context is investigating whether oil and water mix, using separate cups for comparison. Choice A is correct because it identifies Cup 1 as a comparison cup, allowing students to see water's appearance without oil for baseline observations. This shows the student understands that before/after comparison shows change and helps determine if mixing occurred. Choice C represents a common error where students suggest tasting to compare, overlooking safety and the focus on visual mixing. This typically happens because elementary students may not connect materials to specific observations needed, like sight for separation, and might default to taste from everyday experiences. To help students: Practice identifying what makes a good testable question and model setups with controls, like plain water versus mixed, to emphasize comparisons. Watch for: Students who underestimate importance of safety rules, such as no tasting, and try unsafe methods to 'prove' results.
