Unit 3 Lesson 6 and 7 Assessment

What is the difference between an electric motor and an electric generator?

• An electric motor and electric generator are the same thing.

• An electric motor converts mechanical energy into electrical energy, while an electric generator converts electrical energy into mechanical energy.

• An electric motor converts electrical energy into mechanical energy while an electric generator converts mechanical energy into electrical energy.

• An electric motor and electric generator do not require any energy input to function.

Tags

NGSS.MS-PS2-3

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What are the two types of magnets?

• Permanent magnets and electromagnets
• Attractive magnets and repulsive magnets
• Magnetic and non-magnetic magnets
• Temporary magnets and super magnets

Bob is enjoying his summer vacation. He tries to remember which poles of a magnet are attracted to each other, but he can't! Can you help him?

• Similar poles

• Opposite poles

• North poles

• South poles

What happens when you break a magnet into two pieces?

• Each piece becomes a new magnet with a north and south pole.

• The magnet loses its magnetic properties.

• One piece becomes a north pole and the other becomes a south pole.

• The pieces repel each other.

Which of the following is a property of electromagnets?

• They are always magnetic.

• Their magnetic strength can be changed.

• They do not require an electric current to function.

• They are made of non-magnetic materials.

Tags

NGSS.MS-PS2-3

Your friend is helping you study for this test. They ask you, what two forces do magnets have? The correct answer is?

• Attraction or repulsion.

• Repulsion or repulsion.

• Attraction or attraction.

• Positive or negative.

Tags

NGSS.MS-PS2-3

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A magnetic pole is what?

• A type of metal used in construction.
• A term used in electrical circuits.
• A point on a magnet where the magnetic field is weakest.
• A point on a magnet where the magnetic field is concentrated and strongest.

Tags

NGSS.MS-PS2-3

The magnetic forces between poles are ______ when the poles are opposite, and ______ when the poles are similar?

• Attractive, Repulsive.

• Neutral, Repulsive.

• Repulsive, Attractive.

• Attractive, Attractive.

Tags

NGSS.MS-PS2-3

What are two factors that affect the strength of magnetic forces?

• Color of the magnets.

• Distance between the magnets and the magnetic material used.

• Temperature of the environment.

• Size of the magnetic material.

Tags

NGSS.MS-PS2-3

A magnetic field is what?

• A type of electric charge.

• A force field created by a magnet.

• A region around a magnetic material where gravity acts.

• A form of light energy.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5