Variable that is deliberately changed by the scientist

What color seeds do cardinals prefer? What should not be constant?

Which is a qualitative observation?

A hypothesis is formed 

Determine the independent variable used to test the following hypothesis.  If drying times of different paint brands are measured, then the Valspar paint will dry the fastest. 

Which of the following should NOT occur in a science lab setting?

A triple beam balance is used to measure

The problem is to determine which is more effective in eliminating germs from hands?  What would be the best hypothesis?

The group in a scientific experiment that is separated from the rest of the experiment, where the independent variable being tested cannot influence the results is the

The fifth step in scientific investigation is...

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