All flashcards
Flashcard 1: Which reasoning best links evidence to claim: Plants grew taller with more light because photosynthesis makes sugars for growth.
Answer: Photosynthesis makes sugars that provide energy and materials for growth. Connects evidence to claim using the scientific process of photosynthesis.
Flashcard 2: Which data best supports the claim that fertilizer increases growth: plant color notes or height in cm each week?
Answer: Height in cm each week. Quantitative measurements provide stronger evidence than qualitative observations.
Flashcard 3: What is the main function of a plant's stem for growth?
Answer: Support and transport of water and sugars. Contains vascular tissues (xylem and phloem) for transport.
Flashcard 4: Identify the control group: plants with fertilizer or plants with no fertilizer.
Answer: Plants with no fertilizer. Baseline group shows normal growth without treatment.
Flashcard 5: Which conclusion is supported if two plants get equal light and water, but the fertilized plant is taller?
Answer: Fertilizer increased plant growth. Only difference was fertilizer, so it caused the height difference.
Flashcard 6: Which statement is the best evidence that light affects plant growth: height increased or leaves were green?
Answer: Height increased. Measurable change directly shows growth, not just health.
Flashcard 7: Identify the best claim: Plant A grew taller because it got more light, or Plant A is green.
Answer: Plant A grew taller because it got more light. States cause-effect relationship answering the investigation question.
Flashcard 8: What is the independent variable in a plant growth investigation?
Answer: The factor that is changed on purpose. It's the condition you deliberately manipulate in the experiment.
Flashcard 9: Which plant structure makes most of the plant's food using sunlight?
Answer: Leaves. Contain chloroplasts with chlorophyll for photosynthesis.
Flashcard 10: What is the dependent variable in a plant growth investigation?
Answer: The factor that is measured as the result. It changes in response to the independent variable.
Flashcard 11: Which plant structure absorbs most water and minerals from soil?
Answer: Roots. Root hairs increase surface area for absorption.
Flashcard 12: Which gas do plants release during photosynthesis?
Answer: O2 (oxygen). Byproduct of splitting water molecules during photosynthesis.
Flashcard 13: What is reasoning in a CER argument about how plants grow?
Answer: Science ideas that connect evidence to the claim. Explains why the evidence supports your claim using scientific principles.
Flashcard 14: What is the best definition of a claim in a scientific argument about plant growth?
Answer: A statement that answers the investigation question. States what you learned from the investigation results.
Flashcard 15: What is the best definition of evidence in a plant growth argument?
Answer: Data from observations and measurements. Facts collected through scientific investigation support conclusions.
Flashcard 16: What are controlled variables in a plant growth investigation?
Answer: Factors kept the same for all groups. Ensures fair testing by eliminating other influences.
Flashcard 17: What is the main function of chlorophyll?
Answer: To absorb light energy for photosynthesis. Green pigment captures light energy in chloroplasts.
Flashcard 18: Which gas do plants take in for photosynthesis?
Answer: CO2 (carbon dioxide). Enters through stomata and provides carbon for glucose production.
Flashcard 19: Which reasoning correctly links evidence to claim: more CO2 led to more growth because…?
Answer: CO2 is used to make sugars that build plant tissues. Links CO₂ to growth through sugar production mechanism.
Flashcard 20: Which plant structure absorbs most of the water needed for growth?
Answer: Roots. Root hairs increase surface area for maximum water uptake.
Flashcard 21: Identify the independent variable in: 'Effect of light color on plant height.'
Answer: Light color. The variable you change/control in the experiment.
Flashcard 22: Identify the dependent variable in: 'Effect of light color on plant height.'
Answer: Plant height (growth). The variable you measure to see the effect.
Flashcard 23: Which option is the best control group when testing fertilizer effects on growth?
Answer: Plants grown with no fertilizer. Controls receive no treatment to show baseline growth.
Flashcard 24: Which option is the strongest evidence: one plant grew, or averages from many plants?
Answer: Averages from many plants (more trials). Multiple trials reduce random error and increase reliability.
Flashcard 25: Identify the best conclusion: Plant A got light; Plant B did not; only A grew well.
Answer: Light is needed for healthy growth. The difference in growth shows light's importance.
Flashcard 26: Choose the evidence that best supports: 'Water affects plant growth.'
Answer: Plants with more water grew taller than those with less. Direct comparison shows water's effect on height.
Flashcard 27: Identify the best evidence of photosynthesis occurring during growth in light.
Answer: Oxygen production (or increased sugar/starch in leaves). Both are direct products of the photosynthesis process.
Flashcard 28: What is the main function of chlorophyll in plant growth?
Answer: Absorbs light energy for photosynthesis. Chlorophyll captures light needed to convert CO₂ and water into sugar.
Flashcard 29: What gas do plants release as a product of photosynthesis?
Answer: Oxygen. O₂ is released when water molecules split during light reactions.
Flashcard 30: Which evidence best supports the claim that plants need carbon dioxide to grow?
Answer: Plants grow less when carbon dioxide is limited. Limited CO₂ restricts photosynthesis, reducing growth rate.