A scientist is studying the effect of temperature on the ability of a plant to g

Question

A scientist is studying the effect of temperature on the ability of a plant to grow. She places four plants in environments of four different temperatures. All plants are given the same amount of water and light each day. She measures the height of each plant at the end of a month. Which of the following describes the dependent and independent variables?

a. The dependent variable is the room temperature; the independent variable is the plant heights. b. The dependent variable is the room temperature; the independent variable is the amount of water. c. The dependent variable is the plant heights; the independent variable is the room temperature. d. The dependent variable is the amount of light; the independent variable is the plant heights.

Explanation / Answer

An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.

A dependent variable is the variable being tested and measured in a scientific experiment

In this question room temperature is the variable which is being controlled. so room temperature is the independent variable. plant heights is the variable which is being tested. so plant heights is the dependent variable.

so answer is (c) The dependent variable is the plant heights; the independent variable is the room temperature.

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