Which of the following is an example of using a control in a scientific investigation
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Which of the following is an example of using a control in a scientific investigation

[From: ] [author: ] [Date: 11-05-16] [Hit: ]
......
a.
using a wide range of temperatures during an experiment

b.
studying animals in different habitats and under different circumstances

c.
keeping a chemical’s concentration the same in all parts of an experiment

d.
studying fixed objects such as the stars

-
(c).
1
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