Part A Which statement is a central idea of the text?

Variables are sometimes used in the scientific method.

The scientific method is based on observations,

Scientists generate guesses in the scientific method.

The scientific method is based on reading scientific journals

Part B

Which detail from the text best supports the answer in Part A?

Experiments produce evidence for scientific ideas.

Scientists share their results in journals and papers.

Conditions change in different experiments,

Hypotheses are ideas about what might happen.