Science Quiz

What are the ends of a magnet called?

• bars

• poles

• motors

• fields

Cora observes some items in her science kit. When she moves a stone, a paper clip in the kit moves toward the stone. Which type of force causes the paper clip to move toward the stone?

• a magnetic force attracting

  metal

• the sun lighting items near

  Earth

• friction acting on objects

  that are moving

• a magnetic force causing

  like poles to repel

Bar magnets and electromagnets have similarities and differences.

Which of these correctly describes one difference between bar magnets and electromagnets?

• Bar magnets have a

  magnetic field, but

  electromagnets do not.

• Electromagnets are

  temporary, but bar magnets are permanent.

• Electromagnets have two poles, but bar magnets have only one pole.

• Bar magnets have two poles, but electromagnets have only one pole.

Which is an object that can pull things made of iron and steel?

• energy

• magnet

• pole

• nail

What is the place on a magnet where the force is the strongest?

• magnetic field

• motor

• electromagnet

• magnetic pole

Which is a tool that uses electricity to make things move?

• motor

• nail

• paper clip

• iron filings

Which can be made with a battery, a piece of iron, and a coiled wire?

• magnetic pole

• electromagnet

• iron filings

• nail

What is the area around a magnet in which the force of the magnet acts?

• magnetic field

• motor

• electromagnet

• energy

On a camping trip, Bryan notices that the needle of a compass always points north to south. Why does this happen?

• The needle points toward colder places.

• Gravity makes the needle point this way.

• The sun makes the needle

  point this way.

• Earth has a magnetic field, and the needle is magnetic.

What is happening?

• The magnet is attracting the paper clip.

• The magnet is attracting the sheet of paper.

• The sheet of paper is attracting the paper clip.

• The sheet of paper is attracting the magnet.