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A student conducted an experiment to test whether talking to plants would help them to grow faster. The student talked to one group of plants and hand watered them. The student did not talk to the other group of plants and used sprinklers. After three weeks, the plants that were spoken to showed much more growth than the plants that were not. The student concluded that talking to plants makes them grow.

Which statement describes the validity of the student's results?

A. They are valid because the student ran a controlled experiment.
B. They are not valid because the student did not control all the variables that can affect plant growth
C. They are valid because the dependent variable caused a change in the independent variable
D. They are not valid because the time frame to grow a plant is too short.

Answer :

Answer:

Option B,They are not valid because the student did not control all the variables that can affect plant growth

Explanation:

In case of water applied to the plants - the student watered the plant to which he has spoken by hand and to the remaining plants to which he has not spoken, he watered them by using sprinkler.  

Water is an essential factor that effects plant growth. This factor must have been controlled. However, the water was given to both the plants only the quantity of water given varies in the two cases. Hence, the claim of student is not valid.

Hence, option B is correct

The statement that shows the validity of the student's results is option b.

Water applied:

When the water was applied to the plants so here the student watered the plant from which he has spoken by hand and to the left plants to which he has not spoken. Water is an important factor that impacts plant growth. This factor should be controlled.

Learn more about the water here: https://brainly.com/question/2821877

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