An electric generator transforms:

mechanical energy into electric energy.

To make a simple electromagnet you need:

a copper wire, a nail, and a battery.

How is an electromagnet different from a regular magnet?

All of the answers are correct.

When you observe, you

All of the answers are correct.

converts electric energy to mechanical energy.

How did the nail and wire become a magnet?

The nail and wire were magnetized by electricity.

to change from one form to another.

Why can't the nail and wire pick up the metal objects any longer?

The magnetic field got weaker once electricity was removed.

In the simple electromagnet we made, the battery was needed to:

supply the electricity (electric current).

the area of push or pull around a magnet.

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Electromagnets!

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Review of vocabulary words and concepts of electromagnets for middle school ESOL

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Questions 15

Answers

1
An electric generator transforms:
mechanical energy into electric energy.
electric energy into mechanical energy.
water into gas.
mechanical energy into magnets.
2
How do you control the strength of an electromagnet?
Both answers are correct.
You can increase the source of electricity (battery).
You can add more coils to the wire.
3
Electric energy is created by
potential energy.
winning the Stanley Cup.
the light of the moon.
the movement of electrons.
4
To make a simple electromagnet you need:
a copper wire, a nail, and a light bulb.
a copper wire and a nail.
a copper wire.
a copper wire, a nail, and a battery.
5
How is an electromagnet different from a regular magnet?
It is man made.
You can control the strength of the magnet.
All of the answers are correct.
You can turn it on and off.
6
When you observe, you
Use your hands to touch.
Use your nose to smell.
Use your eyes to look at and your ears to listen.
All of the answers are correct.
7
The south pole and north pole of a magnet will
pull and repel each other.
push and attract each other.
push and repel each other.
pull and attract each other.
8
An electric motor:
all answers are correct.
converts electric energy to mechanical energy.
converts mechanical energy to electric energy.
transforms magnets.
9
The definition of generate is:
to repel.
to make or produce.
to attract.
to change from one form to another.
10
How did the nail and wire become a magnet?
The wire pulled at the paperclips.
It's magic!
The nail is made of iron so it attracts.
The nail and wire were magnetized by electricity.
11
A transformation is:
to make or produce something.
to produce magnetism.
to change from one form to another.
to stir something.
12
Why can't the nail and wire pick up the metal objects any longer?
The magnetic field got stronger because of electricity.
The magnetic field got weaker once electricity was removed.
The copper wire got too hot.
The nail got too hot.
13
In the simple electromagnet we made, the battery was needed to:
make the magnet heavy.
make the magnet pretty.
supply the heat.
supply the electricity (electric current).
14
The north pole and north pole of a magnet will
push and repel each other.
push and pull each other.
attract and repel each other.
push and attract each other.
15
A magnetic field is
the area of push or pull around a magnet.
the sound waves in the air.
None of the answers are correct.
the area of heat around a magnet.

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