The variable that is purposely changed in order to be tested is the

A controlled experiment

Determining that the moon is the same age as Earth based on comparison of the age of moon rocks to the age of Earth rocks is an example of

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.

Scientists design controlled experiments to test a _____________

A possible answer to a scientific question.

A repetition of an experiment

A generalization that makes sense of observations by using logical reasoning.

The process by which people gather evidence about the natural world and propose explanations based on this evidence

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