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Canadian Adult Achievement Test (CAAT) — Level C

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A scientist is testing the effect of different types of soil on the growth of bean plants. She plants identical bean seeds in three separate pots. Pot A contains sandy soil, Pot B contains clay soil, and Pot C contains loam soil. All pots are given the same amount of water and sunlight. She measures the height of the plants every week. What is the independent variable in this experiment?
Correct Answer:
The type of soil

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