Magnetism

1.

1 point

In the first project, why did you test the nail first to see if it is magnetic?

the directions said so

the magnet was attracted to the nail

you need to know that it is the nail that makes it magnetic

you need to know that it is the experiment that makes it magnetic

2.

1 point

How does the Earth act like a huge bar magnet?

Earth has a North and South friction pole

Earth has a North and South magnetic pole

It is repelled by the sun

It is attracted to the sun

3.

1 point

Un- and dis- are examples of

time prefixes

location prefixes

number prefixes

negative prefixes

4.

1 point

Which of these has an electromagnet in it?

a doorbell

a dinner plate

a sofa

a paperclip

5.

1 point

In which sentence is the verb in the present tense?

Only the emperor wore a yellow robe.

The new rug made the room brighter.

Waves crash over the sides of the boat.

None of the above

6.

1 point

What is the push or pull of a magnet called?

magnetic reaction

magnetic electricity

magnetic force

magnetic generation

7.

1 point

In which sentence is the verb incorrect?

Armando and Dylan were the first ones finished.

The calf was born last night.

Two people thinked he was right.

None of the above

8.

1 point

There is no friction from wheels on rails on a magnetic train. Friction is

rolling

a loud noise

rubbing

a force with no energy

9.

1 point

What makes a compass work?

electricity from the air

the gravitational pull of the moon

the tides

Earth's magnetic force

10.

1 point

What are magnets made of?

plastic or rubber

iron or steel

air and water

dirt and water

11.

1 point

A North pole of a magnet will always be attracted to

the North pole of another magnet

plastic

the South pole of another magnet

a compass

12.

1 point

An electric current can produce its own magnetic field. In this sentence, a current is a

flow

tide

very thin wire

unit of measure

13.

1 point

The Earth has a hot iron core.The core of something is its

central part

top

warmest part

length

14.

1 point

Why are magnets sometimes labeled at their poles?

so the poles that attract to each other are identified

so the poles that attract to the floor are identified

so we can have them color coordinated

so we can have them easily stored

15.

1 point

In which sentence is the verb in the past tense?

Grandma wound up the ball of yarn.

People stand in line for hours to see popular movies.

Customers pay for lunch over there.

None of the above

16.

1 point

Rarely means about the same as

lightly

not often not often

surely

not cooked

17.

1 point

Why is a magnetic train faster than an ordinary train?

It does not run on fuel.

It does not need a conductor.

It "floats" above the tracks and has more friction than an ordinary train.

It "floats" above the tracks and has less friction than an ordinary train.

18.

1 point

In which sentence is the verb in the past tense?

My younger sister liked the bears at the zoo.

The lizard sits in the sun getting warm.

That mechanic works on boat motors.

None of the above

19.

1 point

In which sentence is the verb correct/.

You am not going.

Are I in the right room?

It is important.

None of the above

20.

1 point

In what form is iron usually found?

in its pure form

in its liquid form

mixed with other metals

mixed with other gases