Mystery Science Invisible Forces

In the watermelon video, the last rubber band caused the watermelon to burst because...

• it was stronger than the other rubber bands.
• it was thicker than the other rubber bands.
• it was the last rubber band in the bag.
• it created a force that was greater than the force of the watermelon rind.

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Push, pull or both?
Pressing a button

• Push
• Pull
• Both

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Push, pull or both?
Towing a person on a raft

• Push
• Pull
• Both

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Push, pull or both?
Yanking your sister's hair

• Push
• Pull
• Both

Magnets attract

• objects that contain iron
• only other magnets
• anything made of metal
• things that are not too heavy

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The force that keeps me on the ground is...

• Magnetism

• Friction

• Gravity

• Muscular force

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Gravity is a

• pushing force

• pulling force

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What force causes a pen to fall to the floor when dropped?

• magnetism
• gravity
• friction
• motion

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Examples of forces that make something move are...

• pushes
• pulls
• both pushes and pulls

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Which one of these things is magnetic?

• paper clips

• pennies

• paper

• pencils

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