Magnetism and Electromagnetism Review

Which of the following statements describing magnets is the most correct?

• All magnets have two poles, either both south or both north.

• Magnets only have one pole. It is either a south pole or a north pole.

• All magnets have two poles, one north pole and one south pole.

• Magnets can have any number of poles as long as the number is odd.

Which of the following elements is NOT a permanent magnet?

• Iron (Fe)

• Cobalt (Co)

• Copper (Cu)

• Nickel (Ni)

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Which of the following statements about permanent magnets is the most correct?

• Permanent magnets are any material and are always magnetic.

• Permanent magnets are only a few materials and are always magnetic.

• Permanent magnets are magnetic when placed in a magnetic field and keep the field permanently.

• Permanent magnets are magnetic when placed in a magnetic field but lose the field quickly.

What type of materials make up temporary magnets?

• Metals except for Iron, Cobalt, and Nickel.

• All metals.

• Any material can be a temporary magnet.

• All materials made of wood or plastic.

What is the main difference between electric charges and magnetic poles?

• There can be several different types of magnetic poles, but there are only two types of charges.

• Charges can act over an area whereas magnets can only make a force when in contact.

• Magnetic poles can attract and repel, charges only repel.

• Electric charges can be isolated and separated whereas magnetic poles cannot be seperated.

Tags

NGSS.MS-PS2-3

A magnetic field will always travel away from the ________ and into the _______ pole.

• north, north

• south, south

• north, south

• south, north

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Based on the image of the magnetic field shown, which magnetic poles most likly represent spot A and spot B.

• Spot A is a North pole and Spot B is a South pole.

• Spot A and Spot B are both North poles.

• Spot A and Spot B are both South poles,

• Spot A is a South pole and Spot B is a North pole.

Tags

NGSS.MS-PS2-3

Based on the magnetic field created by the two magnets shown in the image, what are the magnetic poles most likely at spot A and spot B?

• Spot A is a North pole and Spot B is a South pole.

• Spot A is a South pole and Spot B is a North pole.

• Spot A and Spot B are both South Poles.

• Spot A and Spot B are both North Poles.

Tags

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Why does the Earth's inner core a strong magnetic field?

• There is solid iron in the Earth's inner core.

• There is molten (liquid) iron spinning in Earth's inner core.

• There is a core of iron running east and west along the equator.

• There metals such as aluminum and copper in the earth core spinning around.

Tags

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A compass lies up _________ to the magnetic field around it.

• perpendiculap

• parallel

• vertically

• diagonally

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