- Use the evidence. What does the data show plants need to stay green?
Answer: Plants need sunlight. The plant with sunlight stayed green; the one without sunlight turned pale.
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.
- Compare the plants. What do the healthy plants have that the others don't?
Answer: Plants need both sunlight and water. Plant A had both and was healthiest; plants missing one did poorly.
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.
- Use the observations. What do plants need, based on the evidence from all groups?
Answer: Plants need both sunlight and water. The plant with both was tall and green; the others were weak or dead.
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.
- Use the observations. What do plants need to grow strong stems?
Answer: Plants need both sunlight and water. The plant with both had a strong stem; others were weak.
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.
- Compare the plants. What do the healthy plants have that the others don't?
Results after 12 days:
Answer: Plants need both sunlight and water. Plant A grew most and stayed green.
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.
- Use the evidence. What do plants need to grow more leaves?
Answer: Plants need both sunlight and water. The plant with both had 10 leaves; others had fewer.
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.
- Use the evidence. Jamal says plants only need water. Is he correct?
Results after 11 days:
Answer: No. Plants need sunlight too. Plant A was green and tall; Plant B was weak and pale.
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.
- Compare the plants. What do the healthiest plants have that others don't?
Answer: Plants need both sunlight and water. The plant with both was healthiest; the others were weak or dying.
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.
