Magnets Quiz

Students are investigating to see if magnets will attract objects through different materials. They observe that the setup shown below works and that the magnet attracts the object. The object will most likely still be attracted to the magnet if which change is made?

• The magnet is moved much farther away from the glass.

• The glass is replaced with a piece of paper.

• The nail is replaced with a plastic spoon.

• The glass is replaced with a thick piece of wood.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Students attached both ends of a long wire to the poles of a battery and wound the wire around a spoon. They found that the spoon will now pick up small objects made of iron. This is because the flow of electricity is able to produce -

• a sound wave.

• thermal energy.

• a magnetic field.

• light energy.

Tags

NGSS.MS-PS2-3

Students in a science class observe a magnet. One student records the following observations: The magnet picks up paper clips. The magnet can be turned off and on. The magnet does not attract plastic. The magnet is not very heavy. Which observation provides evidence that the magnet the students observed is an electromagnet?

• The magnet is not very heavy.

• The magnet does not attract plastic.

• The magnet picks up paper clips.

• The magnet can be turned off and on.

Tags

NGSS.3-PS2-3

Bar magnets are different from electromagnets because bar magnets -

• stop being magnetic near other magnets.

• require electricity to produce a magnetic field.

• maintain a magnetic field at all times

• produce a magnetic field only when pointed north.

Tags

NGSS.MS-PS2-3

Students place paper clips on a desk, and then hold a magnet under the desk. What evidence would best show that the magnetic field was able to pass through the desk?

• The top of the desk is made of a kind of plastic.

• The magnet they are using is the largest one in the classroom.

• The paper clips move when the magnet is moved under the desk.

• The students were able to pick up these paper clips with a magnet.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Identify the main characteristics of an electromagnet

• battery, iron nail, wires, coils

• battery, iron nail, wires

• battery, north and south pole, magnetic field

• magnetic field, coils, and battery

What are the advantages of an electromagnet?

• they can be made weaker or stronger

• they are permanent

• they use a battery

• they can be turned on and off

Iron filings and bar magnets are placed on a piece of paper. Explain the pattern on the diagram. Where is the magnetic field the strongest?

• at the poles

• in the middle

• on the entire magnet