U3.4 Checkpoint #1

A magnet is best defined as an object that attracts which of the following materials?

• Glass and plastic

• Iron and nickel

• Copper and aluminum

• Wood and rubber

Tags

NGSS.MS-PS2-3

Which of the following is an example of a ferromagnetic element, a key component of magnetic materials?

• Gold

• Silver

• Cobalt

• Carbon

The image shows iron filings surrounding a bar magnet. Where is the magnetic force the strongest?

• In the middle of the magnet

• At the north and south poles

• On the side with the 'N'

• Evenly distributed all around the magnet

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Two magnets are placed near each other with their north poles facing. What will happen?

• They will attract each other.

• They will repel each other.

• They will not interact.

• One magnet will lose its magnetism.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

In a magnetic material is not magnetized, how are the magnetic domains arranged?

• All domains point in the same direction.

• The domains are arranged in random directions, canceling each other out.

• The material has no magnetic domains.

• The domains form a circular pattern.

A student places a compass near a bar magnet. Which direction will the red part (north) of the compass needle point?

• Toward the S pole of the magnet

• Away from the S pole of the magnet

• To the left

• To the right

Why is the magnetic force considered a noncontact force?

• It can only push objects, not pull them.

• It requires two objects to be physically touching.

• It can act on objects over a distance without direct contact.

• It only works on objects that are very small.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

An iron nail is picked up by a strong magnet. While touching the magnet, the nail is able to pick up paper clips. When the magnet is removed, the nail drops the paper clips. The nail acted as a:

• permanent magnet.

• magnetic domain.

• nonmagnetic material.

• temporary magnet.

This levitating planter floats because the magnetic force from the base does what?

• Pushes the planter up, counteracting the force of gravity.

• Pulls the planter down, adding to the force of gravity.

• Makes the planter nonmagnetic.

• Heats the air beneath the planter.

Tags

NGSS.MS-PS2-5

What is the primary difference between a permanent magnet and a piece of unmagnetized iron?

• The iron has no magnetic domains, while the magnet does.

• The iron's magnetic domains are randomly aligned, while the magnet's are aligned in one direction.

• The permanent magnet is made of cobalt, while the iron is not.

• The permanent magnet has only a north pole, while the iron has both.