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Irina18 [472]
3 years ago
13

In his experiment on spontaneous generation, Louis Pasteur changed only one thing between his experimental groups: whether or no

t the neck of the flask was broken. That means that his experiment was _____.

Chemistry
1 answer:
kumpel [21]3 years ago
5 0

Louis Pasteur's experiment was A) <em>controlled</em>.

A scientist must change <em>only one variable at a time</em> to see if it is the one causing the observed change.

The scientist must keep all the other variables constant (i.e. <em>control </em>the variables)

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