Physical Science - Magnetism Quiz

What happens when you split a magnet in half?

• It becomes twice as strong

• You end up with two smaller magnets

• You end up with a North Pole magnet and a South Pole Magnet (as long as you split it perfectly in half)

• Your magnet loses all of it's magnetism (it leaks out of the break)

Why does a compass align itself with Earth's North Pole?

• Because compass needles are slightly magnetized and align themselves with earth's magnetic field

• Because one of the poles of the magnet is called the North Pole, so it would only make sense that it would be on the North side

• They don't actually do this, they just align themselves with the North side of a map

• Because North is slightly downhill (as long as you are in the Northern Hemisphere) so gravity causes the compass to point North

Tags

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What happens when an object with random magnetic domains is placed into a strong magnetic field?

• It is attracted to the magnetic field

• It aligns with the field and shoots off like superman

• It aligns with the field and usually becomes a temporary magnet itself

• Its domains start moving faster and it gets warmer

Tags

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How are two ways that Earth's magnetic field is useful for us?

• It allows us to know which direction is "Down" and allows for better navigation

• It protects the surface of the earth from UV rays and causes tides

• It produces the Auroras and causes the spin of the earth

• It blocks the harmful Solar Wind and allows for more efficient navigation

What happens magnetically when electricity runs through a wire (or any charged particle moves).

• Nothing, magnetism and electricity are separate phenomenon

• The magnetic field matches that of the Earth

• It generates a magnetic field around the wire

• It uses magnetism to move the charge through the wire

Tags

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How can I make a permanent magnet no longer magnetic? (Select all that apply)

• Hit/Drop it repeatedly

• Put it near a tv or cell phone

• Submerge it in water for several hours

• Put it next to another magnet long term

• Heat it up

What is a device that changes electrical current in a magnetic field into kinetic energy (movement)? (Vocab)

• Magnetic Pole

• Dipole

• Electromagnet

• Electric Motor

• Magnetic Domain

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This is when the magnetic domains within a piece of metal (like a nail) are oriented by an electrical current, making a very strong temporary magnet. (Vocab)

• Magnetic Pole

• Dipole

• Electromagnet

• Electric Motor

• Magnetic Domain

These are the areas of a permanent magnet where the magnetic field is the strongest, usually one at each end of the magnet. (Vocab)

• Magnetic Pole

• Dipole

• Electromagnet

• Electric Motor

• Magnetic Domain

When there is a permanent magnet, these are the atoms with partial magnetism that are all arranged along the same direction. (Vocab)

• Magnetic Pole

• Dipole

• Electromagnet

• Electric Motor

• Magnetic Domain