Magnets and magnetism

Which of the following metals are non-magnetic?

A Iron

B Steel

C Copper

D Aluminium

• A and B only

• A and C only

• B and C only

• C and D only

Tags

NGSS.MS-PS2-3

Four students, Jay, Rene, Melissa and Keane made the following statements about magnets during their science lesson:

Jay: A magnet can attract all metals.

Rene: Like poles repel, unlike poles attract.

Melissa: Like poles attract, unlike poles repel.

Keane: All metals can be made into magnets.

Which of the student(s) is/are correct?

• Jay only

• Rene only

• Jay and Melissa

• Rene and Keane

Study the diagram.

During an experiment, Carol used a bar magnet to stroke Object X repeatedly for 30 times. After that, Object X was able to attract some paper clips. Based on the above experiment, which of the following statements is correct?

• Object X is a magnetic metal.

• Object X is a non-magnetic metal.

• The magnet lost all its magnetism after it was used to stroke Object X.

• The more times Object X was stroked, the less number of paper clips it could attract.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Jade attached a magnet on the roof of each toy car as shown in the diagram.

When Jade brought toy car A nearer to toy car B, both toy cars A and B came towards each other. Why is it so?

• Toy car A has North pole facing the South pole on Toy car B. Unlike poles attract and the toy cars move towards each other.

• Toy car A has North pole facing the North pole on Toy car B. Like poles attract and the toy cars move towards each other.

• Toy car A has South pole facing the South pole on Toy car B. Unlike poles attract and the toy cars move towards each other.

• Toy car A has North pole facing the North pole on Toy car B. Unlike poles attract and the toy cars move towards each other.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Jade attached a magnet on the roof of each toy car as shown in the diagram.

When Jade brought toy car A nearer to toy car B, both toy cars A and B came towards each other.

Jade then rearranged the magnets and the two toy cars moved away from each other. What did Jade do to make this happen?

• Jade reversed Toy car B so that it has North pole facing the North pole on Toy car A. Like poles repel and the toy cars move away from each other.

• Jade reversed Toy car A so that it has South pole facing the North pole on Toy car B. Unlike poles repel and the toy cars move away from each other.

• Jade reversed Toy car B so that it has North pole facing the South pole on Toy car B. Like poles repel and the toy cars move away from each other.

• Jade reversed Toy car B so that it has North pole facing the North pole on Toy car A. Like poles attract and the toy cars move away from each other.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Refer to the diagram.

• Wen Ling

• Le Fan

• Yi Tian

• Zachary

Refer to the diagram.

Which one of the following is true about metal bars A and B?

• Both metal bars A and B are magnets.

• Both metal bars A and B are made of non-magnetic materials.

• Metal bar A is a magnet while metal bar B is made of magnetic material.

• Metal bar A is made of magnetic material while metal bar B is a magnet.

Tags

NGSS.MS-PS2-3

Shane turned 4 identical iron nails E, F, G and H, into electromagnets using the electrical method as shown in the diagram.

Which one of the following correctly identifies the strongest and weakest electromagnets?

• Strongest electromagnet – G, Weakest electromagnet – E

• Strongest electromagnet – H, Weakest electromagnet – G

• Strongest electromagnet – F, Weakest electromagnet – H

• Strongest electromagnet – H, Weakest electromagnet – E

Tags

NGSS.MS-PS2-3

Janet had two identical magnets, A and B, which attracted the same number of steel paper clips. She then dropped magnet A on the floor 300 times.

What would she likely observe of she brought magnets A and B near the same steel paper clips as shown above?

• Magnet A attracted more steel paper clips than magnet B.

• Magnet A attracted less steel paper clips than magnet B.

• Both magnets A and B did not attract any steel paper clips.

• Both magnets A and B attracted the same number of steel paper clips.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which one of the following objects make use of magnets in order to function?

• Door stopper

• Tap

• Zipper

• Light bulb

Tags

NGSS.MS-PS2-3