what is the first step in the scientific method

scientists make their questions based on their

an investigation in which all the conditions are controlled is a

scientists use these when they cannot use the real thing

an experiment is designed to answer this

the part of the experiment that remains the same that all other parts are compared to

the part of the experiment that can be changed

this type of graph shows change over time

this type of graph compares parts to whole

this type of graph compares groups of things

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