Magnetism

Why is a compass needle attracted to the North?

• There wind in the north

• Because it is being attracted to the Magnetic South Pole

• Because there iron in the north

• It repeals from the north pole

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What forces works only by combining electric and magnetic forces?

• electromagnet

• electric

• static electricity

• magnetic

How could I increase the strength of my electromagnet?

• More Batteries

• Smaller paper clips

• More loops of copper wire

• Larger Nail

How do electromagnets differ from regular magnets?

Choose all that apply

• It can become taller and shorter

• They can be turned on and off

• It weaker then regular magnets

• Their strength can be changed

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

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Two bar magnets are held close together. They are released and allowed to move freely. The bar magnets quickly come together. Which best explains why this happens?

• The poles facing one another are both south poles

• The poles facing one another are both north poles

• The poles facing one another are opposite poles

• One magnet was bigger than the other

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NGSS.MS-PS2-5

What happens to the strength of the magnetic force when magnets are moved further apart?

• The force depends on the type of magent.

• The magnetic force is stronger.

• There is no change is the magnetic force.

• The magnetic force is weaker.

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Two magnets pull on each other. What can make the magnets pull with LESS force?

• Add heat to one magnet.

• Use two stronger magnets.

• Turn both magnets around.

• Move magnets farther apart.

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What would happen is a north pole of a magnet came close to a north pole of another magnet?

• they would be attracted to each other

• they would be repelled from each other

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What happens if you hold the south pole of one magnet close to the north pole of another magnet?

• They will attract each other

• They will repel each other

• They will grow very hot

• Nothing will happen

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