What is Science?

By measuring the height of a building, a scientist is gathering

• independent variable

• dependent variable

• quantitative data

• qualitative data

The statement "The caterpillar is 3 centimeters long is a

• observation

• theory

• inference

• hypothesis

An inference is a logical interpretation of an observation.

• True

• False

To be useful in science, a hypothesis must be

• measurable

• observable

• testable

• correct

Which statement is true about a controlled experiment?

• All the variables must be kept the same.

• Only one variable is tested at a time.

• Everything can be studied by setting up a controlled experiment.

• Controlled experiments cannot be performed on living things.

A scientific theory is

• The same as a hypothesis

• A well tested explanation that unifies a broad range of observations.

• The same as the conclusion of an experiment

• The first step in a controlled experiment.