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Darya [45]
3 years ago
14

Why must an experiment or a survey be controlled? What is the difference between the control group and the experimental group in

a controlled experiemnt?
Biology
2 answers:
Novosadov [1.4K]3 years ago
8 0
In tho control group everything is kept constant.
notka56 [123]3 years ago
5 0
An experiment or survey must be controlled in order to receive accurate results.

In an experimental group, the independent variable is changed. But in the control group, the independent variable stays the same.
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Which property of matter does the intrument measure
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Explanation:

Instruments are designed and calibrated to take measurement of certain properties in the environment.

Most scientific instruments measures quantitatively, a wide range of physical and chemical properties.

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Explanation:

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6 0
1 year ago
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Explanation:

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6 0
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</span>
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3 years ago
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