Balancing Forces Unit Review

What is gravity?

• A non-touching force

• Energy

• A push

• A touching force

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Which has a STRONGER force of gravity, Earth or the Moon?

• Earth
• Moon

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Why can astronauts jump and float a little on the Moon?

• Because the Moon's gravity is NOT that STRONG.
• Because the Moon's gravity is VERY STRONG. 

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Gravity attracts all objects towards one another. 

• True
• False 

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How are gravity and magnetism related?

• They are both non-touching forces.

• They are both touching forces.

• They both push things up.

• They are not related.

What makes the train in Faraday RISE?

• gravity

• repelling electromagnets

• friction

• Something pulls it up.

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Electromagnets are strong magnets that can be turned on and off. 

• True
• False

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Choose all of the items needed to create an electromagnet. You MUST choose MORE THAN 1 ANSWER!

• electricity

• copper wire

• iron core

• foam

• cotton

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What causes the train to fall back on the tracks?

(You may choose more than 1 answer!)

• gravity

• turning off an electromagnet

• friction

• inertia

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When two magnets attract, they ________.

• push apart

• change color

• get colder

• pull together

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