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12 October, 03:47

Amber has written the following prediction: "If a rock is put under a great deal of pressure, then the minerals in the rock will chemically change." What is the independent variable used in an investigation to test this prediction? A. the amount of pressure placed on the rock B. the type of minerals used to form the rock C. the number of rocks tested D. the chemical composition of individual minerals

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  1. 12 October, 05:53
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    The independent variable is the variable we have full control over or we could manipulate. Thus, from among the choices below:

    A. the amount of pressure placed on the rock B. the type of minerals used to form the rock C. the number of rocks tested D. the chemical composition of individual minerals

    The answer is A. (the amount of pressure placed on the rock). It is the independent variable.
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