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What are the only forces that can both attract and repel?

• Magnetic and atomic forces

• Electric and atomic forces

• Magnetic and static forces

• Electric and magnetic forces

What is the weakest universal force, but is so much a part of your life that you probably take it for granted?

• Atoms

• Electricity

• Magnetic

• Gravity

What does Newton's law of universal gravitation state?

• No objects in the universe attract each other

• Only a few objects in the universe attract each other

• Only 100 objects in the universe attract each other

• Every object in the universe attracts every other object

The greater the ________ of the objects, the greater is the gravitational force.

• Distance

• Mass

• Speed

• Rotation

The force that holds particles in the nucleus together is the ___________________

• strong nuclear force

• weak nuclear force

• gravitational force

• electromagnetic force

The sun's mass is much greater than the mass of Earth, so the sun's gravitational force is much _____________________ than that of Earth.

• stronger

• better

• weaker

• heavier