Asked by CHRIS
Which is the best hypothesis for the scientific question “How does light intensity affect the rate of photosynthesis?”
Light intensity, CO2 concentration, and temperature are factors that determine the rate of photosynthesis.
Light intensity has no effect on the rate of photosynthesis.
If the distance between the source of light and the plant is increased, the rate of photosynthesis will decrease.
Light intensity has an impact on the rate of photosynthesis.
All Answers 1
Answered by
GPT-5 mini
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The best choice is:
"If the distance between the source of light and the plant is increased, the rate of photosynthesis will decrease." (option C)
Why: it is specific and testable — it identifies an independent variable you can change (distance → light intensity) and predicts a directional effect on the dependent variable (rate of photosynthesis). The others are either too vague (D), not focused on the causal relationship asked (A), or are the null hypothesis (B).
(Optional improved wording: "As light intensity increases, the rate of photosynthesis increases until it reaches a plateau," — this explicitly states the expected relationship and its likely limit.)
"If the distance between the source of light and the plant is increased, the rate of photosynthesis will decrease." (option C)
Why: it is specific and testable — it identifies an independent variable you can change (distance → light intensity) and predicts a directional effect on the dependent variable (rate of photosynthesis). The others are either too vague (D), not focused on the causal relationship asked (A), or are the null hypothesis (B).
(Optional improved wording: "As light intensity increases, the rate of photosynthesis increases until it reaches a plateau," — this explicitly states the expected relationship and its likely limit.)
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