Elementary School Science Quiz: Evidence Of Plant Growth Needs
17 questions · exam conditions
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Evidence Of Plant Growth NeedsQuestion 1 of 17

Use the results. What do plants need to grow, based on the evidence?

Plants need water. The watered plant grew to 9 inches, but the unwatered plant wilted and stayed 3 inches.
Plants need only sunlight. Both plants had sun, so water does not matter.
Plants need neither water nor sunlight. Plants grow because pots are round.
Plants need only soil. Soil makes plants tall, not water.
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Elementary School Science Quiz

Elementary School Science Quiz: Evidence Of Plant Growth Needs

Practice Evidence Of Plant Growth Needs 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 Evidence Of Plant Growth Needs, 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

Use the results. What do plants need to grow, based on the evidence?

  1. Plants need water. The watered plant grew to 9 inches, but the unwatered plant wilted and stayed 3 inches. (correct answer)
  2. Plants need only sunlight. Both plants had sun, so water does not matter.
  3. Plants need neither water nor sunlight. Plants grow because pots are round.
  4. Plants need only soil. Soil makes plants tall, not water.
Explanation: This question assesses the skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use evidence from investigations to answer questions by observing what happened in different conditions, then comparing the results; for example, if Plant A with water grew and Plant B without water died, this evidence shows plants need water, and we look at the data like measurements, observations, and health to decide what plants need, ensuring our conclusion matches the evidence. The investigation tested water with both plants having sunlight: the plant with water grew to 9 inches and was healthy, while the plant without water wilted and stayed at 3 inches, showing that the plant with water did better, which is clear evidence that plants need water to grow. The correct answer is A because it correctly identifies that plants need water and uses evidence from the investigation, referencing specific data like 'the watered plant grew to 9 inches, but the unwatered plant wilted and stayed 3 inches,' and connects these observations to the conclusion by showing the direct impact of water. Choice B is incorrect because it claims plants need only sunlight and ignores the evidence that water matters, stating both had sun so water does not matter, which contradicts the growth difference; this error happens when students don't compare the results or focus on the wrong factor. To help students use investigation evidence, teach the comparison process: (1) Look at Plant A's conditions and results, (2) Look at Plant B's, (3) What's different about conditions? (4) What's different about results? (5) Connect: Plants with water did better, so plants need water. Use evidence sentence frames like 'Plants need water. The evidence shows: The plant with water grew 9 inches; the one without wilted at 3 inches. This proves plants need water,' and practice with T-charts for conditions and results, emphasizing matching the data and requiring explicit evidence references.

Question 2

Compare the plants. What do the healthiest plants have that others don't?

  1. Plants need both sunlight and water. The plant with both was healthiest; the others were weak or dying. (correct answer)
  2. Plants need only sunlight. The plant with sun but no water was healthiest.
  3. Plants need only water. The plant with water but no sun grew the most.
  4. Plants need neither. No sunlight and no water made the plant grow best.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If Plant with both sunlight and water was healthiest while others were weak or dying, this EVIDENCE shows plants need both. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested both sunlight and water needs by comparing plants. RESULTS: The plant with both sunlight and water was healthiest. Other plants lacking one or both needs were weak or dying. Comparing these results shows the healthiest plants have both sunlight and water that others don't have. The plant with both needs met did best, which is clear evidence. The correct answer is A because it correctly identifies that plants need both sunlight and water AND uses evidence from the investigation. It references the observations—the plant with both was healthiest while others were weak or dying—and connects these observations to the conclusion. The answer shows: state what plants need + use evidence from data + explain connection. Choice B is incorrect because it claims plants need only sunlight and contradicts evidence showing plants without water were not healthy. This error happens when students ignore part of the evidence or don't compare all conditions properly. To help students use investigation evidence: Teach comparison process—(1) Look at plant with both needs conditions and results, (2) Look at plants missing one or both needs and results, (3) What's different about the plants? (4) What's different about results? (5) Connect: Plants with both sunlight and water were healthiest, so plants need both. Use evidence sentence frames: 'Plants need both sunlight and water. The evidence shows: The plant with both was healthiest. Plants without one or both were weak or dying. This proves plants need both.' Make T-chart: Conditions (both/missing water/missing sun/neither) | Results (healthiest/weak/dying). Practice reading data tables—'Find the plant with both. How healthy is it? Now find plants missing something. Compare!' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows only plants with both needs were healthy, then plants need both—the evidence tells us.

Question 3

Use the evidence. What does the data show plants need to stay green?

  1. Plants need only water. The plant with water was green even without sunlight.
  2. Plants need sunlight. The plant with sunlight stayed green; the one without sunlight turned pale. (correct answer)
  3. Plants need neither sunlight nor water. Both plants stayed healthy.
  4. Plants need music. Quiet plants grow better than loud plants.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If Plant with sunlight stayed green and Plant without sunlight turned pale, this EVIDENCE shows plants need sunlight. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested sunlight needs for keeping plants green. RESULTS: The plant with sunlight stayed green and healthy. The plant without sunlight turned pale. Comparing these results shows plants need sunlight to stay green. The plant with sunlight did better, which is clear evidence. The correct answer is B because it correctly identifies that plants need sunlight AND uses evidence from the investigation. It references the observations—the plant with sunlight stayed green while the one without sunlight turned pale—and connects these observations to the conclusion. The answer shows: state what plants need + use evidence from data + explain connection. Choice A is incorrect because it claims plants need only water and ignores the evidence about sunlight's role in keeping leaves green. This error happens when students don't compare the plants properly or misread which factor was being tested. To help students use investigation evidence: Teach comparison process—(1) Look at plant with sunlight conditions and results, (2) Look at plant without sunlight conditions and results, (3) What's different about the plants? (4) What's different about results? (5) Connect: Plants with sunlight stayed green, so plants need sunlight. Use evidence sentence frames: 'Plants need sunlight. The evidence shows: The plant with sunlight stayed green. The plant without sunlight turned pale. This proves plants need sunlight.' Make T-chart: Conditions (sunlight/no sunlight) | Results (green/pale). Practice reading data tables—'Find the plant in sunlight. What color is it? Now find the plant without sunlight. Compare!' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows plant without sunlight turned pale, then plants need sunlight—the evidence tells us.

Question 4

Use the evidence. Jamal says plants only need water. Is he correct?

Results after 11 days:

  1. Yes. Plant B had water and no sun, and it grew the most.
  2. No. Plants need sunlight too. Plant A was green and tall; Plant B was weak and pale. (correct answer)
  3. Yes. Plants need neither sunlight nor water. Both plants looked healthy.
  4. No. Plants only need a bigger pot. Pot size makes plants grow tall.
Explanation: This question assesses the skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use evidence from investigations to answer questions by observing what happened in different conditions, then comparing the results; for example, if Plant A with both grew well and Plant B with only water was weak, this evidence shows plants need sunlight too, and we look at the data like measurements, observations, and health to decide what plants need, ensuring our conclusion matches the evidence. The investigation tested if only water is enough, with results showing Plant A had sunlight and water and was green and tall, while Plant B had water but no sun and was weak and pale, comparing these shows plants need sunlight too, as the plant with both did better, which is clear evidence. The correct answer is B because it correctly identifies that plants need sunlight too, not just water, and uses evidence from the investigation, referencing the observations like 'Plant A was green and tall; Plant B was weak and pale,' and connects these observations to the conclusion by showing what plants need plus evidence from data plus explanation of the connection. Choice A is incorrect because it says yes to only water but contradicts evidence, as Plant B with only water did not grow most; this error happens when students ignore comparisons or reverse results. To help students use investigation evidence, teach: (1) Look at claims, (2) Find evidence for/against, (3) Compare plants, (4) Conclude based on data. Use frames like 'No, because Plant A had sun and water and grew tall, Plant B had only water and was weak,' with T-charts, emphasizing matching evidence and watching for misreads.

Question 5

Use the evidence. What do plants need to grow more leaves?​

  1. Plants need only water. The plant with water but no sun grew the most leaves.
  2. Plants need both sunlight and water. The plant with both had 10 leaves; others had fewer. (correct answer)
  3. Plants need neither. All plants had the same number of leaves.
  4. Plants need to be touched. Touching leaves makes more leaves grow.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If Plant with both sunlight and water had 10 leaves while others had fewer, this EVIDENCE shows plants need both to grow more leaves. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested what plants need to grow more leaves. RESULTS: The plant with both sunlight and water had 10 leaves. Plants lacking one or both needs had fewer leaves. Comparing these results shows plants need both sunlight and water to grow more leaves. The plant with both needs met grew the most leaves, which is clear evidence. The correct answer is B because it correctly identifies that plants need both sunlight and water AND uses evidence from the investigation. It references the observations—the plant with both had 10 leaves while others had fewer—and connects these observations to the conclusion. The answer shows: state what plants need + use evidence from data + explain connection. Choice A is incorrect because it claims plants need only water and that the plant with water but no sun grew the most leaves, which contradicts the evidence showing the plant with both needs had the most leaves. This error happens when students make partial conclusions or don't compare all the data properly. To help students use investigation evidence: Teach comparison process—(1) Look at plant with both needs leaf count, (2) Look at plants with only one need leaf count, (3) What's different about the plants? (4) What's different about results? (5) Connect: Plants with both sunlight and water had most leaves, so plants need both. Use evidence sentence frames: 'Plants need both sunlight and water. The evidence shows: The plant with both had 10 leaves. Plants without one or both had fewer leaves. This proves plants need both.' Make T-chart: Conditions (both/water only/sun only) | Results (10 leaves/fewer leaves). Practice reading data tables—'Find the plant with both needs. Count its leaves. Now find plants with only one need. Compare!' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows plants with both needs had most leaves, then plants need both—the evidence tells us.

Question 6

Compare the plants. What do the healthy plants have that the others don't?

Results after 12 days:

  1. Plants need both sunlight and water. Plant A grew most and stayed green. (correct answer)
  2. Plants need no water. Plant C had no water, so it should grow best.
  3. Plants need only shade. Plants grow best with no sunlight.
  4. Plants need only a bigger pot. A bigger pot makes leaves green.
Explanation: This question assesses the skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use evidence from investigations to answer questions by observing what happened in different conditions, then comparing the results; for example, if Plant A with both grew and others without one or both died, this evidence shows plants need both, and we look at the data like measurements, observations, and health to decide what plants need, ensuring our conclusion matches the evidence. The investigation tested sunlight and water, with results showing Plant A had both sunlight and water and grew most and stayed green, while others lacking one or both did not, comparing these results shows that healthy plants have both, which is clear evidence they need them. The correct answer is A because it correctly identifies that plants need both sunlight and water and uses evidence from the investigation, referencing the observations like 'Plant A grew most and stayed green,' and connects these observations to the conclusion by showing what plants need plus evidence from data plus explanation of the connection. Choice B is incorrect because it claims plants need no water and contradicts the evidence, as Plant C without water did poorly; this error happens when students reverse the evidence or make claims without using data. To help students use investigation evidence, use evidence sentence frames: 'Plants need both sunlight and water. The evidence shows: Plant A had both and grew most. Others did not and grew poorly. This proves plants need both,' and teach comparison: (1) Look at healthy plants' conditions, (2) Look at unhealthy ones, (3) What's different? (4) Connect to needs. Practice with T-charts for conditions and results, emphasizing that answers must match data, and watch for students who state needs without evidence or misread conditions.

Question 7

Based on the results, what do plants need most to grow taller?​

  1. Plants need water. The plant with water grew 8 inches; the one with no water did not grow. (correct answer)
  2. Plants need only sunlight. The plant in sun grew even without water.
  3. Plants do not need water. Dry soil helps plants grow fast.
  4. Plants need bigger pots. The pot size makes leaves green.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If Plant with water grew 8 inches and Plant without water grew 0 inches, this EVIDENCE shows plants need water. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested water needs for plant growth. RESULTS: The plant with water grew 8 inches. The plant with no water did not grow at all (0 inches). Comparing these results shows plants need water to grow taller. The plant with water did dramatically better, which is clear evidence. The correct answer is A because it correctly identifies that plants need water AND uses evidence from the investigation. It references the specific observations—the plant with water grew 8 inches while the one with no water did not grow—and connects these observations to the conclusion. The answer shows: state what plants need + use evidence from data + explain connection. Choice B is incorrect because it claims plants need only sunlight and contradicts the evidence that shows water is essential for growth. This error happens when students ignore the clear data about water's importance or focus on the wrong factor. To help students use investigation evidence: Teach comparison process—(1) Look at watered plant conditions and results, (2) Look at unwatered plant conditions and results, (3) What's different about the plants? (4) What's different about results? (5) Connect: Plants with water grew 8 inches, so plants need water. Use evidence sentence frames: 'Plants need water. The evidence shows: The plant with water grew 8 inches. The plant without water grew 0 inches. This proves plants need water.' Make T-chart: Conditions (water/no water) | Results (8 inches/0 inches). Practice reading data tables—'Find the watered plant. How much did it grow? Now find the unwatered plant. Compare!' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows plant without water didn't grow, then plants need water—the evidence tells us.

Question 8

Based on the data, what does the evidence show plants need?

  1. Plants need water. The watered plant stayed green and grew; the dry plant wilted and turned brown. (correct answer)
  2. Plants need only sunlight. The plant with no water grew taller than the watered plant.
  3. Plants need neither water nor sunlight. Both plants were healthy.
  4. Plants need more soil. More dirt always makes plants grow faster.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If watered plant stayed green and grew while dry plant wilted and turned brown, this EVIDENCE shows plants need water. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested water needs for plant health. RESULTS: The watered plant stayed green and grew. The dry plant (no water) wilted and turned brown. Comparing these results shows plants need water. The plant with water did much better, which is clear evidence. The correct answer is A because it correctly identifies that plants need water AND uses evidence from the investigation. It references the observations—the watered plant stayed green and grew while the dry plant wilted and turned brown—and connects these observations to the conclusion. The answer shows: state what plants need + use evidence from data + explain connection. Choice B is incorrect because it claims plants need only sunlight and contradicts the evidence by saying the plant with no water grew taller, which goes against the stated results. This error happens when students reverse the evidence or misread which plant had which conditions. To help students use investigation evidence: Teach comparison process—(1) Look at watered plant conditions and results, (2) Look at dry plant conditions and results, (3) What's different about the plants? (4) What's different about results? (5) Connect: Plants with water stayed healthy, so plants need water. Use evidence sentence frames: 'Plants need water. The evidence shows: The watered plant stayed green and grew. The dry plant wilted and turned brown. This proves plants need water.' Make T-chart: Conditions (water/no water) | Results (green and growing/wilted and brown). Practice reading data tables—'Find the watered plant. What happened? Now find the dry plant. Compare!' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows dry plant wilted, then plants need water—the evidence tells us.

Question 9

Look at the results. What can we conclude plants need to grow well?

  1. Plants need only water. The watered plant grew, so sunlight is not needed.
  2. Plants need both sunlight and water. The plant with both grew most and looked healthiest. (correct answer)
  3. Plants need neither. The unwatered plant grew the same as the watered plant.
  4. Plants need cold air. Cooler plants always grow taller.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If Plant with both sunlight and water grew most and looked healthiest, this EVIDENCE shows plants need both. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested what plants need to grow well. RESULTS: The plant with both sunlight and water grew the most and looked healthiest. Plants lacking one or both needs grew less or looked unhealthy. Comparing these results shows plants need both sunlight and water to grow well. The plant with both needs met did best, which is clear evidence. The correct answer is B because it correctly identifies that plants need both sunlight and water AND uses evidence from the investigation. It references the observations—the plant with both grew most and looked healthiest—and connects these observations to the conclusion. The answer shows: state what plants need + use evidence from data + explain connection. Choice A is incorrect because it claims plants need only water and ignores evidence about sunlight's importance, suggesting sunlight is not needed when the data shows otherwise. This error happens when students make partial conclusions or don't consider all factors tested. To help students use investigation evidence: Teach comparison process—(1) Look at plant with both needs conditions and results, (2) Look at plants with only one need conditions and results, (3) What's different about the plants? (4) What's different about results? (5) Connect: Plants with both sunlight and water grew most, so plants need both. Use evidence sentence frames: 'Plants need both sunlight and water. The evidence shows: The plant with both grew most and looked healthiest. Plants with only one need grew less. This proves plants need both.' Make T-chart: Conditions (what plant had) | Results (growth and health). Practice reading data tables—'Find the plant with both needs. How did it grow? Now find plants with only one need. Compare!' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows plants with both needs grew best, then plants need both—the evidence tells us.

Question 10

Look at the results. What does the evidence show about what plants need?

Results after 10 days:

  1. Plants need both sunlight and water. Plant A did best; Plant D did worst. (correct answer)
  2. Plants need neither sunlight nor water. Plant D was dead because it was too warm.
  3. Plants need only sunlight. Plant C had no sun and still grew best.
  4. Plants need only water. Plant B had water, so it was the healthiest.
Explanation: This question assesses the skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use evidence from investigations to answer questions by observing what happened in different conditions, then comparing the results; for example, if Plant A with both did best and Plant D with neither did worst, this evidence shows plants need both, and we look at the data like measurements, observations, and health to decide what plants need, ensuring our conclusion matches the evidence. The investigation tested sunlight and water, with results showing Plant A had both and did best, Plant D had neither and did worst, while others lacking one did poorly, comparing these shows plants need both, as the plant with both did better and the one without did worst. The correct answer is A because it correctly identifies that plants need both sunlight and water and uses evidence from the investigation, referencing the observations like 'Plant A did best; Plant D did worst,' and connects these observations to the conclusion by showing what plants need plus evidence from data plus explanation of the connection. Choice C is incorrect because it claims plants need only sunlight but reverses evidence, as Plant C without sun did not grow best; this error happens when students misread data or reverse which plant did better. To help students use investigation evidence, use sentence frames and T-charts: 'Plants need both. Evidence: Plant A had both and did best; Plant D had neither and did worst.' Teach steps like comparing conditions and results across plants, practicing with data, and require explicit evidence to avoid ignoring data or opinion-based claims.

Question 11

Use the data. What does the evidence show about what plants need?

Results after 10 days:

  1. Plants need sunlight. Plant A grew taller and stayed green; Plant B was pale and weak. (correct answer)
  2. Plants need only darkness. Plant B had no sunlight, so it grew best.
  3. Plants need neither sunlight nor water. Both plants grew the same.
  4. Plants need only water. Plant B had water, so it was healthiest.
Explanation: This question assesses the skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use evidence from investigations to answer questions by observing what happened in different conditions, then comparing the results; for example, if Plant A with sunlight grew and Plant B without sunlight wilted, this evidence shows plants need sunlight, and we look at the data like measurements, observations, and health to decide what plants need, ensuring our conclusion matches the evidence. The investigation tested sunlight, with results showing Plant A had sunlight and grew taller and stayed green, while Plant B had no sunlight and was pale and weak, comparing these results shows that plants need sunlight to grow well, as the plant with sunlight did better, which is clear evidence. The correct answer is A because it correctly identifies that plants need sunlight and uses evidence from the investigation, referencing the observations like 'Plant A grew taller and stayed green; Plant B was pale and weak,' and connects these observations to the conclusion by showing what plants need plus evidence from data plus explanation of the connection. Choice B is incorrect because it claims plants need only darkness and reverses the evidence, stating Plant B grew best when it actually did poorly; this error happens when students reverse which plant did better or ignore what conditions each plant had. To help students use investigation evidence, teach the comparison process: (1) Look at Plant A conditions and results, (2) Look at Plant B conditions and results, (3) What's different about the conditions? (4) What's different about results? (5) Connect: Plants with sunlight did better, so plants need sunlight. Use evidence sentence frames like 'Plants need sunlight. The evidence shows: Plant A had sunlight and grew taller. Plant B did not and was pale. This proves plants need sunlight,' and practice reading data tables with a T-chart for conditions and results, watching for students who misread which plant had what conditions or claim the opposite of what evidence shows.

Question 12

Use the observations. What do plants need, based on the evidence from all groups?

  1. Plants need only sunlight. Plant B had no sun, so it grew less than Plant A.
  2. Plants need only water. Plant C had water, so it should grow tall without sunlight.
  3. Plants need both sunlight and water. The plant with both was tall and green; the others were weak or dead. (correct answer)
  4. Plants need neither. The results happened by chance.
Explanation: This question assesses the skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use evidence from investigations to answer questions by observing what happened in different conditions, then comparing the results; for example, if Plant A with water grew and Plant B without water died, this evidence shows plants need water, and we look at the data like measurements, observations, and health to decide what plants need, ensuring our conclusion matches the evidence. The investigation tested sunlight and water across groups: the plant with both was tall and green, Plant B had no sun and grew less, Plant C had water but presumably no sun and did not grow tall, while others were weak or dead, showing only the one with both did best, which is clear evidence that plants need both. The correct answer is C because it correctly identifies that plants need both sunlight and water and uses evidence, stating 'The plant with both was tall and green; the others were weak or dead,' and connects observations to the conclusion from all groups. Choice A is incorrect because it claims plants need only sunlight and says Plant B had no sun so grew less, but this ignores that water is also needed as other plants without both were weak; this error happens when students use partial evidence or don't compare all. Teach comparison: (1) Each group's conditions/results, (2) Differences, (3) Common in successful, (4) Connect, (5) Conclude needs both. Frames: 'Need both. Evidence: With both, tall green; others weak/dead. Proves,' T-charts, practice multi-group data, emphasize full evidence, watch for chance claims, require group-specific references.

Question 13

Look at the data. Which need is missing when leaves turn pale yellow?

  1. Water is missing. The pale plant had no water and lots of sunlight.
  2. Sunlight is missing. The plant with no sun was pale and grew only 1 inch. (correct answer)
  3. Soil is missing. Pale leaves mean there is no dirt in the pot.
  4. Nothing is missing. Pale leaves show the plant is very healthy.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If Plant with no sun was pale and grew only 1 inch, this EVIDENCE shows lack of sunlight causes pale leaves. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested which missing need causes pale yellow leaves. RESULTS: The plant with no sun was pale and grew only 1 inch. This shows that when sunlight is missing, leaves turn pale yellow. Comparing plants with and without sunlight shows sunlight prevents pale leaves. The plant without sunlight showed this specific symptom, which is clear evidence. The correct answer is B because it correctly identifies that sunlight is missing when leaves turn pale AND uses evidence from the investigation. It references the observations—the plant with no sun was pale and grew only 1 inch—and connects these observations to the conclusion. The answer shows: identify missing need + use evidence from data + explain connection. Choice A is incorrect because it claims water is missing when the pale plant had no water and lots of sunlight, but this would typically cause wilting/browning rather than pale yellow leaves. This error happens when students confuse different plant symptoms or don't connect specific symptoms to specific missing needs. To help students use investigation evidence: Teach comparison process—(1) Look at pale plant conditions, (2) Identify what's missing, (3) Look at healthy plant conditions, (4) What's different? (5) Connect: Plant without sunlight turned pale, so sunlight prevents pale leaves. Use evidence sentence frames: 'Sunlight is missing when leaves turn pale. The evidence shows: The plant with no sun was pale and grew only 1 inch. This proves lack of sunlight causes pale leaves.' Make T-chart: Missing Need | Plant Symptom. Practice reading data tables—'Find the pale plant. What's it missing? What are its symptoms?' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows plant without sunlight turned pale, then sunlight prevents pale leaves—the evidence tells us.

Question 14

Use the observations. What do plants need to grow strong stems?

  1. Plants need only sunlight. The plant without water had the strongest stem.
  2. Plants need both sunlight and water. The plant with both had a strong stem; others were weak. (correct answer)
  3. Plants need neither. The plant with no sun and no water was strongest.
  4. Plants need shade. Shade makes stems strong and leaves green.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If Plant with both sunlight and water had a strong stem while others were weak, this EVIDENCE shows plants need both. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested what plants need for strong stem growth. RESULTS: The plant with both sunlight and water had a strong stem. Plants lacking one or both needs had weak stems. Comparing these results shows plants need both sunlight and water to grow strong stems. The plant with both needs met did best, which is clear evidence. The correct answer is B because it correctly identifies that plants need both sunlight and water AND uses evidence from the investigation. It references the observations—the plant with both had a strong stem while others were weak—and connects these observations to the conclusion. The answer shows: state what plants need + use evidence from data + explain connection. Choice A is incorrect because it claims plants need only sunlight and falsely states the plant without water had the strongest stem, which contradicts typical plant biology. This error happens when students ignore evidence about water's importance or make claims without checking the data. To help students use investigation evidence: Teach comparison process—(1) Look at plant with both needs conditions and results, (2) Look at plants missing needs conditions and results, (3) What's different about the plants? (4) What's different about results? (5) Connect: Plants with both sunlight and water had strong stems, so plants need both. Use evidence sentence frames: 'Plants need both sunlight and water. The evidence shows: The plant with both had a strong stem. Plants without one or both had weak stems. This proves plants need both.' Make T-chart: Conditions (both/missing water/missing sun) | Results (strong stem/weak stem). Practice reading data tables—'Find the plant with both needs. How is its stem? Now find plants missing something. Compare!' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows only plants with both needs had strong stems, then plants need both—the evidence tells us.

Question 15

Compare the plants. What do the healthy plants have that the others don't?

  1. Plants need both sunlight and water. Plant A had both and was healthiest; plants missing one did poorly. (correct answer)
  2. Plants need only sunlight. Plant C had no sun and was weak, so sun is enough.
  3. Plants need only water. Plant B had water, so it should be the healthiest.
  4. Plants do not need sunlight or water. They just need a bigger cup.
Explanation: This question assesses the skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use evidence from investigations to answer questions by observing what happened in different conditions, then comparing the results; for example, if Plant A with water grew and Plant B without water died, this evidence shows plants need water, and we look at the data like measurements, observations, and health to decide what plants need, ensuring our conclusion matches the evidence. The investigation tested sunlight and water with multiple plants: Plant A had both and was the healthiest, Plant B had only water and did poorly, Plant C had only sunlight and was weak, showing that plants with both did better while those missing one were poor, which is clear evidence that plants need both. The correct answer is A because it correctly identifies that plants need both sunlight and water and uses evidence from the investigation, stating 'Plant A had both and was healthiest; plants missing one did poorly,' and connects these observations to the conclusion by comparing what healthy plants have. Choice B is incorrect because it claims plants need only sunlight and says Plant C had no sun and was weak so sun is enough, but this ignores the need for water as other plants missing water also did poorly; this error happens when students focus on the wrong factor or use partial evidence. To help students, teach comparison steps: (1) Each plant's conditions/results, (2) Differences, (3) What's common in healthy ones? (4) Connect to needs, (5) Conclude based on evidence. Use frames like 'Plants need both. Evidence: Plant A both, healthiest; missing one, poor. Proves need,' T-charts, data practice, watch for ignoring evidence, and require specific data points in answers.

Question 16

Based on the data, what is necessary for plants to grow well?

Results after 14 days:

  1. Plants need only water. Plant C had water, so it should be healthiest.
  2. Plants need both sunlight and water. Only Plant A was tall and green. (correct answer)
  3. Plants need neither sunlight nor water. Plant D should grow best.
  4. Plants need only sunlight. Plant B had sun, so it grew best.
Explanation: This question assesses the skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use evidence from investigations to answer questions by observing what happened in different conditions, then comparing the results; for example, if only Plant A with both grew well and others didn't, this evidence shows plants need both, and we look at the data like measurements, observations, and health to decide what plants need, ensuring our conclusion matches the evidence. The investigation tested sunlight and water, with results showing only Plant A had both and was tall and green, while Plant C had water but no sun and did poorly, Plant B had sun but no water and did poorly, and Plant D had neither and did worst, comparing these shows both are necessary, as only the plant with both did well. The correct answer is B because it correctly identifies that plants need both sunlight and water and uses evidence from the investigation, referencing the observations like 'Only Plant A was tall and green,' and connects these observations to the conclusion by showing what plants need plus evidence from data plus explanation of the connection. Choice D is incorrect because it claims plants need only sunlight and ignores evidence, as Plant B with sun but no water did not grow best; this error happens when students partial evidence or don't compare all plants. To help students use investigation evidence, teach comparison: (1) Look at each plant's conditions and results, (2) Identify what the best plant had that others didn't, (3) Connect to needs. Use T-charts and frames like 'Plants need both because Plant A had them and grew tall, while others lacked one and did poorly,' practicing data tables and emphasizing evidence-based conclusions to correct misreads.

Question 17

Based on the results, what does the evidence show plants need to not wilt?

  1. Plants need water. The plant with no water wilted and turned brown. (correct answer)
  2. Plants need only sunlight. Sunlight stops wilting even with dry soil.
  3. Plants need neither. Wilting happens even when plants get water.
  4. Plants need a taller cup. Taller cups stop leaves from wilting.
Explanation: This question tests skill 2-LS2-1: Using evidence from investigation observations to determine what plants need—sunlight and water—to grow. Scientists use EVIDENCE from investigations to answer questions. We observe what happened in different conditions, then COMPARE the results. If Plant with no water wilted and turned brown, this EVIDENCE shows plants need water to not wilt. We look at the DATA—measurements, observations, health—and use it to decide what plants need. Our conclusion must match the evidence. The investigation tested what prevents wilting in plants. RESULTS: The plant with no water wilted and turned brown. This shows that water prevents wilting. Comparing watered and unwatered plants shows water keeps plants from wilting. The plant without water showed wilting, which is clear evidence. The correct answer is A because it correctly identifies that plants need water to not wilt AND uses evidence from the investigation. It references the observations—the plant with no water wilted and turned brown—and connects these observations to the conclusion. The answer shows: state what plants need + use evidence from data + explain connection. Choice B is incorrect because it claims plants need only sunlight and that sunlight stops wilting even with dry soil, which contradicts basic plant biology where water is essential for preventing wilting. This error happens when students ignore the direct connection between water and wilting or focus on the wrong factor. To help students use investigation evidence: Teach comparison process—(1) Look at watered plant conditions and results, (2) Look at unwatered plant conditions and results, (3) What's different about the plants? (4) What's different about results? (5) Connect: Plants without water wilted, so plants need water to not wilt. Use evidence sentence frames: 'Plants need water to not wilt. The evidence shows: The plant with no water wilted and turned brown. This proves plants need water.' Make T-chart: Conditions (water/no water) | Results (healthy/wilted). Practice reading data tables—'Find the plant without water. What happened to it? Now find the watered plant. Compare!' Emphasize: Our answer must MATCH the data, not what we think or hope. If data shows plant without water wilted, then plants need water—the evidence tells us.