8 Grade First Semester Exam Review 3

What would proposing an explanation for the changing colors of the sky be an example of?

• Conclusion
• Experiment
• Variable
• Hypothesis

The factors that can change in an experiment are called

• variables.
• hypothesis.
• conclusion.
• data table.

One useful tool that may help a scientist interpret data by revealing unexpected patterns is a

• law.
• graph.
• theory.
• variable.

The factor that may change in response to the manipulated variable is called the

• hypothetical variable.
• independent variable.
• operational variable.
• responding variable.

During an experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the

• operational variable.
• dependent variable.
• manipulated variable.
• responding variable.

The tendency of an object to resist change in its motion is known as

• mass.
• balance.
• inertia.
• force.

During photosynthesis, plants transform electromagnetic energy from the sun into

• chemical energy.
• thermal energy.
• electrical energy.
• kinetic energy.

How do liquid water, ice, and water vapor differ from each other?

• They are made of different kinds of atoms.
• They are different compounds.
• They are different states of matter.
• They are made of different kinds of molecules.

What characteristics listed below do photosynthesis and combustion NOT share?

• Both are endothermic.
• Both involve chemical change.
• Both cause changes in matter.
• Both change energy from one form to another.

Radio waves, visible light from the sun, infrared "rays" from heat lamps, the waves that heat food in a microwave oven, ultraviolet rays, and X-rays are all considered types of

• electrical energy.
• electromagnetic energy.
• potential energy.
• chemical energy.