In a plant growth experiment testing the effect of light, which variable is the independent variable?

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Prepare for the Virginia 7th Grade Science SOL Test. Incorporate flashcards and multiple choice questions, each with hints and detailed explanations. Ensure your success on the exam!

Multiple Choice

In a plant growth experiment testing the effect of light, which variable is the independent variable?

Explanation:
The independent variable is what you deliberately change to see its effect. In a plant growth study focused on light, you vary how much sunlight the plants receive, so the amount of sunlight is the independent variable. The outcome you measure to see the effect of that change is plant height, which is the dependent variable. The type of soil and the amount of water are kept the same to avoid other factors influencing growth, so they’re constants rather than variables being tested.

The independent variable is what you deliberately change to see its effect. In a plant growth study focused on light, you vary how much sunlight the plants receive, so the amount of sunlight is the independent variable. The outcome you measure to see the effect of that change is plant height, which is the dependent variable. The type of soil and the amount of water are kept the same to avoid other factors influencing growth, so they’re constants rather than variables being tested.

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