Magnets and Magnetism

Which element is magnetic?

• calcium

• chromium

• carbon

• cobalt

Jill uses a magnet to pick up a nail. Then, she touches the nail to a paper clip and picks up the paper clip. What will most likely happen when she pulls the magnet away from the nail?

• The paper clip will stay attached to the nail because the nail is now a permanent magnet.

• The paper clip will stay attached to the nail because the paper clip is now a permanent magnet.

• The paper clip will fall off of the nail because the nail was only a temporary magnet.

• The paper clip will fall off of the nail because the nail is now magnetized in the opposite direction.

Tags

NGSS.MS-PS2-5

Mr. Garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is

• iron.

• carbon.

• plastic.

• glass.

Tags

NGSS.MS-PS2-5

Which refers to the ends of a magnet where the forces are strongest?

• attracting forces

• opposing forces

• magnetic fields

• magnetic poles

In an illustration, lines of force are drawn around a magnet to illustrate the magnetic

field.

induction.

poles.

force.

• field.

• induction.

• poles.

• force.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which statement about Earth’s core helps explain Earth’s magnetic field?

• Earth’s core is composed of magnets.

• Earth’s core is composed of iron and nickel.

• The outer core is solid.

• The inner core is liquid and moving.

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NGSS.HS-PS2-5

Which best describes Earth’s magnetic field lines?

• The field lines go out of Earth near the South Pole, enter Earth in the North Pole, and are aligned with the geographic poles

• The field lines go out of Earth near the South Pole, enter Earth in the North Pole, and are not aligned with the geographic poles.

• The field lines go out of Earth near the North Pole, enter Earth in the South Pole, and are aligned with the geographic poles.

• The field lines go out of Earth near the North Pole, enter Earth in the South Pole, and are not aligned with the geographic poles.

A compass taken to Earth’s moon does not point in a specific direction on the moon.

What is the most likely reason for the difference between how the compass works on Earth and on the moon?

• The moon lacks an atmosphere.

• The moon contains no rocks that have iron.

• The moon does not have a strong magnetic field.

• The moon has no bodies of water.

An object that is made of which material is likely to be attracted to a magnet?

• nitrogen

• nickel

• paper

• plastic

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

How are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it?

• The field lines combine with the lines around the second south pole.

• The field lines overlap with the lines from the second south pole.

• The field lines bend toward the second south pole.

• The field lines bend away from the second south pole.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5