NBPTS AYA Science Practice Questions - NBPTS Science Adolescence And Young Adulthood (Component 1 Content Knowledge) Exam

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Students test how fertilizer concentration affects plant height. Which variable should be controlled to make the results more valid?

The height of each plant at the end of the investigation The concentration of fertilizer solution The amount of light each plant receives The conclusion students prefer before collecting data

Correct Answer:

The amount of light each plant receives

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