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26 October, 03:07

A chemist is study the effects of minerals on plant growth. She knows that phosphorus stimulates pant growth. She decides to test the effects of various phosphorus concentration on plants every 5 days over a 20 day period what is the independent variable?

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  1. 26 October, 04:12
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    Independent variable is what you will change in an experiment.

    therefore, the independent variable should be the concentration of phosphorus every 5 days

    because she wanted to know how different concentration affects the plant growth
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