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STatiana [176]
3 years ago
8

How much has earth changed in its history?

Biology
1 answer:
LiRa [457]3 years ago
4 0

The earth has changed a lot in its history through exploration, colonization, and industrialization effecting the physical land and spreading cultures and ways of life

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Explanation:

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Answer:

See the answer below

Explanation:

<em>The control group in an experimental study is the subject group that is not administered the treatment variable. The control group forms the baseline for comparing the effects produced by the treatment variable on the experimental group.</em>

Thus, in this case, <u>the control group would be the 10 mice that were not exposed to the radio waves.</u>

The independent or the manipulated variable, in this case, is <u>the exposure or otherwise of the mice to the radio waves. </u>

The dependent variable is the actual variable that is going to be measured, otherwise known as the effect variable. In this case, the dependent variable would be <u>the strength of the mice measured by their ability to push the block of wood blocking their food.</u>

Since 8 out 10 mice and 7 out of 10 mice were able to push the wooden block in both the experimental and the control group, <u>Bart's conclusion should reject the hypothesis that the radio waves make mice extra strong</u>.

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