This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret experimental evidence to support the claim that plants get materials chiefly from air and water, not soil. Multiple types of evidence prove that most plant matter comes from air and water, not soil: Van Helmont's famous willow tree experiment showed that a tree gained 164 pounds while the soil lost only 0.1 pound—the tree's mass couldn't have come from soil because the soil barely decreased; chemical analysis shows plants are 45% carbon (from CO₂ in air), 42% oxygen (from H₂O and CO₂), and 6% hydrogen (from H₂O)—totaling about 93% from air and water, with only about 6-7% from soil minerals; hydroponic experiments prove plants can grow without soil at all, showing soil is not the source of plant matter; when scientists remove carbon dioxide from air, plants stop growing, and when they add more CO₂, plants grow faster—this proves carbon from air is essential for building plant mass; all this evidence leads to one conclusion: plants get their matter chiefly from carbon dioxide in air and water, with small amounts of minerals from soil. Choice B is correct because it accurately states that plant matter comes mostly from air and water, since soil mass changed very little, which matches Van Helmont's evidence where the tree gained 164 lb but soil lost only 0.1 lb, countering the idea that soil becomes most of the plant. Choice A fails because it claims soil is the main source despite the minimal soil loss, representing the common misconception that soil is hard to measure but still the primary source—but the evidence proves otherwise. To help students understand evidence for air and water as matter sources: Present Van Helmont's as a mystery: 'Tree gained 164 lb, soil lost 0.1 lb—where did it come from?'; do the math: 'If from soil, soil would lose 164 lb, but it didn't'; teach: 'Plants are made of air and water,' and focus on what experiments prove over intuition.

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret experimental evidence to support the claim that plants get materials chiefly from air and water, not soil. Multiple types of evidence prove that most plant matter comes from air and water, not soil: Van Helmont's famous willow tree experiment showed that a tree gained 164 pounds while the soil lost only 0.1 pound—the tree's mass couldn't have come from soil because the soil barely decreased; chemical analysis shows plants are 45% carbon (from CO₂ in air), 42% oxygen (from H₂O and CO₂), and 6% hydrogen (from H₂O)—totaling about 93% from air and water, with only about 6-7% from soil minerals; hydroponic experiments prove plants can grow without soil at all, showing soil is not the source of plant matter; when scientists remove carbon dioxide from air, plants stop growing, and when they add more CO₂, plants grow faster—this proves carbon from air is essential for building plant mass; all this evidence leads to one conclusion: plants get their matter chiefly from carbon dioxide in air and water, with small amounts of minerals from soil. Choice A is correct because it accurately states that plant matter comes mostly from air and water, with a small part from soil minerals, which matches the data showing 93 g from air and water and only 7 g from soil in a 100-gram plant, demonstrating the sources of plant atoms. Choice B fails because it claims soil minerals are the main source when the evidence shows only 7% from soil, representing the common misconception that roots absorb most mass from soil—but the evidence proves otherwise. To help students understand evidence for air and water as matter sources: Present the composition data: '45g carbon from air, 42g oxygen and 6g hydrogen from water—that's 93% not from soil!'; calculate percentages together: 'Only 7% from soil, so air and water are chief sources'; address that air can become solid, asking: 'What do the numbers prove?'

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret experimental evidence to support the claim that plants get materials chiefly from air and water, not soil. Multiple types of evidence prove that most plant matter comes from air and water, not soil: Van Helmont's famous willow tree experiment showed that a tree gained 164 pounds while the soil lost only 0.1 pound—the tree's mass couldn't have come from soil because the soil barely decreased; chemical analysis shows plants are 45% carbon (from CO₂ in air), 42% oxygen (from H₂O and CO₂), and 6% hydrogen (from H₂O)—totaling about 93% from air and water, with only about 6-7% from soil minerals; hydroponic experiments prove plants can grow without soil at all, showing soil is not the source of plant matter; when scientists remove carbon dioxide from air, plants stop growing; when they add more CO₂, plants grow faster—this proves carbon from air is essential for building plant mass; all this evidence leads to one conclusion: plants get their matter chiefly from carbon dioxide in air and water, with small amounts of minerals from soil. Choice B is correct because it accurately states that plant matter comes mostly from air (CO₂) and water, not soil, which matches what the evidence demonstrates—removing CO₂ stopped growth and adding it increased growth, showing CO₂ from air is essential for mass. Choice A fails because it claims soil is the main source and downplays CO₂ when the evidence shows CO₂ is crucial, representing the common misconception that plants get their matter from soil because we see plants growing in soil—but the evidence proves otherwise. To help students understand evidence for air and water as matter sources: Present Van Helmont's experiment as a mystery: 'The tree gained 164 pounds. The soil lost only 0.1 pound. Where did 164 pounds come from?' Students often guess soil until they see the numbers; emphasize: If the tree got 164 pounds from soil, the soil would weigh 164 pounds less—it doesn't—so the matter came from somewhere else; present the chemical composition evidence: 'Plants are made of carbon, hydrogen, and oxygen—where do these atoms come from? Carbon from CO₂ in air, hydrogen and oxygen from H₂O—that's 93% of the plant right there!'; use hydroponics as modern evidence: 'If plants got their matter from soil, they couldn't grow without soil—but they can—proving matter doesn't come mainly from soil'; teach the phrase: 'Plants don't eat soil—plants are made of air and water'; do the math together: 'If plants were made mostly of soil, the soil would disappear as the plant grows—does that happen? No—so plants must be made of something else—air and water'; watch for students who trust their intuition ('it must be soil') over evidence, or who don't understand that invisible gases (CO₂) have mass and can become solid plant matter; always return to evidence: 'What do the numbers show? What do experiments prove?'

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret experimental evidence to support the claim that plants get materials chiefly from air and water, not soil. Multiple types of evidence prove that most plant matter comes from air and water, not soil: Van Helmont's famous willow tree experiment showed that a tree gained 164 pounds while the soil lost only 0.1 pound—the tree's mass couldn't have come from soil because the soil barely decreased; chemical analysis shows plants are 45% carbon (from CO₂ in air), 42% oxygen (from H₂O and CO₂), and 6% hydrogen (from H₂O)—totaling about 93% from air and water, with only about 6-7% from soil minerals; hydroponic experiments prove plants can grow without soil at all, showing soil is not the source of plant matter; when scientists remove carbon dioxide from air, plants stop growing, and when they add more CO₂, plants grow faster—this proves carbon from air is essential for building plant mass; all this evidence leads to one conclusion: plants get their matter chiefly from carbon dioxide in air and water, with small amounts of minerals from soil. Choice C is correct because it accurately states that plant matter comes mostly from air (CO₂) and water, not mainly from soil, which matches the CO₂ chamber evidence where removing CO₂ stopped growth and adding it increased growth, showing carbon from air is key for plant mass. Choice A fails because it claims soil minerals are the main source when the evidence shows CO₂ from air is essential, representing the common misconception that gases like CO₂ can't contribute to solid matter—but the evidence proves otherwise. To help students understand evidence for air and water as matter sources: Present the CO₂ experiment: 'Plants died without CO₂ but grew faster with more—proving air's carbon builds plant mass'; emphasize: 'CO₂ is invisible but has mass that becomes part of the plant'; watch for students who think air can't add mass, and return to: 'What do experiments prove about CO₂?'

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret experimental evidence to support the claim that plants get materials chiefly from air and water, not soil. The hydroponic experiment provides clear evidence: a plant grown in water with dissolved minerals (no soil) grew almost the same size as a plant grown in soil—this proves plants can grow without soil at all, showing soil is not the main source of plant matter. If soil were the main source of plant matter, the plant without soil couldn't have grown to nearly the same size. Choice C is correct because it accurately states that plant matter comes mostly from air and water, while soil minerals are a small part, which matches what the evidence demonstrates—both plants grew similarly despite one having no soil. Choice A fails because it claims matter comes mostly from soil when the evidence shows a plant grew just fine without any soil; this represents the misconception that plants need dirt to make new mass. To help students understand hydroponic evidence: Ask: 'If plants got their matter from soil, could they grow without soil? No! But this plant did grow without soil.' Emphasize: 'The plant in water grew almost the same as the one in soil—this proves matter doesn't come mainly from soil.' Connect to modern examples: 'Lettuce and tomatoes grown in water (hydroponics) prove plants don't need soil for their matter.' Teach: 'Plants need minerals from soil (that small 7%), but not for making most of their mass—air and water provide the building blocks.'

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret experimental evidence to support the claim that plants get materials chiefly from air and water, not soil. Multiple types of evidence prove that most plant matter comes from air and water, not soil: Van Helmont's famous willow tree experiment showed that a tree gained 164 pounds while the soil lost only 0.1 pound—the tree's mass couldn't have come from soil because the soil barely decreased; chemical analysis shows plants are 45% carbon (from CO₂ in air), 42% oxygen (from H₂O and CO₂), and 6% hydrogen (from H₂O)—totaling about 93% from air and water, with only about 6-7% from soil minerals; hydroponic experiments prove plants can grow without soil at all, showing soil is not the source of plant matter; when scientists remove carbon dioxide from air, plants stop growing, and when they add more CO₂, plants grow faster—this proves carbon from air is essential for building plant mass; all this evidence leads to one conclusion: plants get their matter chiefly from carbon dioxide in air and water, with small amounts of minerals from soil. Choice A is correct because it accurately states that plant matter comes mostly from air (CO₂) and water, not mainly from soil, which matches the evidence showing 93% from carbon, oxygen, and hydrogen in CO₂ and water, and only 7% from soil, explaining how air and water become plant material. Choice B fails because it claims soil minerals make up most plant mass when evidence shows only 7% from soil, representing the common misconception that soil is the primary source—but the evidence proves otherwise. To help students understand evidence for air and water as matter sources: Show the percentages: '93% from air and water, only 7% soil— that's the proof!'; discuss how CO₂ atoms become plant parts; watch for intuition like 'air can't be solid,' and return to: 'What does the composition evidence prove?'

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret experimental evidence to support the claim that plants get materials chiefly from air and water, not soil. The mass composition data provides precise evidence: out of 100 grams total, 45g carbon (from CO₂) + 42g oxygen (from CO₂ and water) + 6g hydrogen (from water) = 93 grams from air and water, leaving only 7 grams from soil minerals. This mathematical evidence proves conclusively that air and water provide about 93% of plant matter. Choice A is correct because it accurately states that plant matter comes mostly from air and water, because they supply about 93 grams (out of 100), which matches exactly what the evidence demonstrates. Choice D fails because it claims equal contributions from air, water, and soil (33 grams each) when the evidence shows air and water together provide 93 grams while soil provides only 7 grams; this represents the misconception that all sources contribute equally. To help students understand mass composition evidence: Do the math together: '45g carbon from air + 42g oxygen from air/water + 6g hydrogen from water = 93g from air and water. That leaves only 7g from soil!' Create a visual: Draw 100 blocks, color 93 blue (air/water) and 7 brown (soil) to show the dramatic difference. Emphasize: 'If plants were made mostly of soil, most of the 100 grams would come from soil—but only 7 grams do!' Connect to atoms: 'Every carbon atom in the plant came from CO₂ in air—that's 45% of the plant right there!'

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret chemical composition data to support the claim that plants get materials chiefly from air and water, not soil. Chemical analysis provides powerful evidence: plants are 45% carbon (from CO₂ in air) and 48% hydrogen/oxygen (from water and CO₂), totaling 93% from air and water sources. This leaves only about 7% for minerals from soil, proving that air and water—not soil—are the primary sources of plant matter. Choice A is correct because it accurately states that plant matter comes mostly from air and water, with little from soil, which perfectly matches the 93% vs 7% evidence. Choice B fails because it claims matter comes mostly from soil minerals, but the evidence shows minerals make up only about 7% of plant mass—the opposite of 'mostly.' To help students grasp this evidence: Use a pie chart showing 93% from air/water and 7% from soil—the visual makes the proportions clear. Ask students: 'If you were 93% made of pizza and 7% made of salad, what would you be mostly made of?' This analogy helps them understand that 93% means 'mostly' while 7% means 'a little.'

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret quantitative data to support the claim that plants get materials chiefly from air and water, not soil. The numerical evidence is conclusive: 93 grams come from carbon, hydrogen, and oxygen (elements found in CO₂ from air and H₂O), while only 7 grams come from minerals (from soil). This 93% vs 7% breakdown proves mathematically that plant matter comes overwhelmingly from air and water, not soil. Choice A is correct because it accurately states that plant matter comes mostly from air and water, with small amounts from soil, which perfectly matches the 93g vs 7g evidence—'mostly' and 'small amounts' correctly describe this 93:7 ratio. Choice B fails because it claims matter comes mostly from soil minerals, but the evidence shows minerals contribute only 7g out of 100g—that's 7%, not 'mostly,' which would require more than 50%. To help students grasp this quantitative evidence: Use 100 pennies to represent the plant—have students physically separate 93 pennies (air/water) from 7 pennies (soil). Ask: 'Which pile is bigger? Which source provides most of the plant?' This concrete visualization makes the proportions undeniable and helps students see that 93% absolutely means 'mostly.'

This question tests the ability to use evidence to explain that plant matter comes mostly from air and water (NGSS 5-LS1-1). Students must interpret experimental evidence to support the claim that plants get materials chiefly from air and water, not soil. Multiple types of evidence prove that most plant matter comes from air and water, not soil: Van Helmont's famous willow tree experiment showed that a tree gained 164 pounds while the soil lost only 0.1 pound—the tree's mass couldn't have come from soil because the soil barely decreased; chemical analysis shows plants are 45% carbon (from CO₂ in air), 42% oxygen (from H₂O and CO₂), and 6% hydrogen (from H₂O)—totaling about 93% from air and water, with only about 6-7% from soil minerals; hydroponic experiments prove plants can grow without soil at all, showing soil is not the source of plant matter; when scientists remove carbon dioxide from air, plants stop growing; when they add more CO₂, plants grow faster—this proves carbon from air is essential for building plant mass; all this evidence leads to one conclusion: plants get their matter chiefly from carbon dioxide in air and water, with small amounts of minerals from soil. Choice B is correct because it accurately states that plant matter comes mostly from air (CO₂) and water, not soil, which matches what the evidence demonstrates—removing CO₂ stopped growth and adding it increased growth, showing CO₂ from air is essential for mass. Choice A fails because it claims soil is the main source and downplays CO₂ when the evidence shows CO₂ is crucial, representing the common misconception that plants get their matter from soil because we see plants growing in soil—but the evidence proves otherwise. To help students understand evidence for air and water as matter sources: Present Van Helmont's experiment as a mystery: 'The tree gained 164 pounds. The soil lost only 0.1 pound. Where did 164 pounds come from?' Students often guess soil until they see the numbers; emphasize: If the tree got 164 pounds from soil, the soil would weigh 164 pounds less—it doesn't—so the matter came from somewhere else; present the chemical composition evidence: 'Plants are made of carbon, hydrogen, and oxygen—where do these atoms come from? Carbon from CO₂ in air, hydrogen and oxygen from H₂O—that's 93% of the plant right there!'; use hydroponics as modern evidence: 'If plants got their matter from soil, they couldn't grow without soil—but they can—proving matter doesn't come mainly from soil'; teach the phrase: 'Plants don't eat soil—plants are made of air and water'; do the math together: 'If plants were made mostly of soil, the soil would disappear as the plant grows—does that happen? No—so plants must be made of something else—air and water'; watch for students who trust their intuition ('it must be soil') over evidence, or who don't understand that invisible gases (CO₂) have mass and can become solid plant matter; always return to evidence: 'What do the numbers show? What do experiments prove?'