8th Grade Science Final Exam

Front

Example of potential energy: A rolling ball, A stretched rubber band, A moving car, A falling apple

Back

A stretched rubber band

Front

Calculate the speed of a runner who covers 200 meters in 25 seconds.

Back

8 meters per second (Speed = Distance / Time = 200 m / 25 s = 8 m/s)

Front

Which force resists motion between two surfaces?

Back

Friction

Front

Newton's Third Law of Motion

Back

For every action, there is an equal and opposite reaction.

Front

When is work done?

Back

An object moves due to a force.

Front

Law of Conservation of Energy

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

Diagram and label the parts of an atom: proton, neutron, electron.

Back

A diagram should show a nucleus with protons and neutrons, and electrons orbiting the nucleus.

Front

Which of the following is a chemical change? Melting ice, Burning paper

Back

Burning paper

Front

Signs that a chemical reaction has occurred:

Back

Change in color, production of gas, formation of a precipitate

Front

When a substance changes from liquid to gas, it is called:

Back

Evaporation