VALID Science 10 Practice Questions - NSW VALID Science 10 Assessment Exam

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A scientist measures the growth rate of radish seedlings exposed to different fertilizer concentrations. Which set of conditions represents variables that MUST be controlled to ensure a fair test?

Fertilizer concentration, seedling height, soil volume, and pot color Soil type, fertilizer concentration, leaf count, and room temperature Soil type, water volume, light exposure, and seedling species Water volume, fertilizer type, seedling height, and harvest time

Correct Answer:

Soil type, water volume, light exposure, and seedling species

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