What is the primary function of a magnet?

• To attract only non-metallic objects

• To attract and repel certain metals

• To generate electricity

• To produce light

Tags

NGSS.MS-PS2-3

Which of the following is a simple procedure to test if an object is magnetic?

• Weigh the object

• Place the object near a magnet and observe

• Measure the object's temperature

• Check the object's color

Explain how an electromagnet differs from a permanent magnet in terms of function.

• An electromagnet can be turned on and off, while a permanent magnet cannot.

• A permanent magnet can be turned on and off, while an electromagnet cannot.

• Both can be turned on and off.

• Neither can be turned on and off.

Which of the following materials is most likely to be attracted to a magnet?

• Plastic

• Wood

• Iron

• Glass

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Describe a simple experiment to observe the interaction between a magnetic field and a magnetic object.

• Use a thermometer to measure the temperature change of the object.

• Place a paperclip near a magnet and observe if it moves.

• Weigh the object before and after exposure to the magnet.

• Measure the object's length before and after exposure to the magnet.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is one key purpose of an electromagnet?

• To permanently magnetize objects

• To create a temporary magnetic field

• To repel all metals

• To generate light

Which of the following statements is true about the strength of an electromagnet?

• It is always weaker than a permanent magnet.

• It can be adjusted by changing the electric current.

• It cannot be changed once created.

• It is not affected by electric current.

Tags

NGSS.MS-PS2-3

Plan an investigation to determine the effect of distance on the strength of a magnetic field.

• Measure the weight of the magnet at different distances.

• Use a ruler to measure how far a paperclip is attracted to the magnet at different distances.

• Record the color change of the magnet at different distances.

• Measure the temperature of the magnet at different distances.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What happens to a magnetic object when it is placed in a magnetic field?

• It changes color.

• It may be attracted or repelled.

• It becomes heavier.

• It melts.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

How can you increase the strength of an electromagnet?

• Decrease the number of coils around the core.

• Increase the electric current flowing through the wire.

• Use a plastic core instead of an iron core.

• Decrease the electric current flowing through the wire.

Tags

NGSS.HS-PS2-5