To test a hypothesis, a scientist purposely changes the dependent variable.
When drawing a conclusion, scientists examine the data to see if it supports or fails to support the hypothesis.
The factor that may change in a controlled experiment is the dependent variable.
A helpful tool for keeping data organized during an experiment is a graph.
A hypothesis can be accepted as true after two repeated trials have been performed.
Posing a question is the first step in the
Accidentally having two or more variables that change in an experiment is one way to
introduce
When scientists communicate results, they always include a description of procedure
so that other scientists can perform a
of the results.
Scientists design controlled experiments to test a
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