MTTC Earth Space Science (020) Practice Questions - MTTC Earth Space Science (020) Test Exam

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A teacher wants students to determine whether the amount of fertilizer affects plant growth. In a well-designed controlled experiment, which of the following should be the independent variable?

The type of soil used for all plants The height of the plants measured after four weeks The amount of sunlight each plant receives The amount of fertilizer applied to each plant

Correct Answer:

The amount of fertilizer applied to each plant

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