Your friend places a magnet on the table and states that magnets have only attractive forces. You disagree, saying that magnets have attractive and repulsive forces. To show your friend, you place another magnet on the table, as shown below. Nothing happens. What should you do to convince your friend of your claim?

Turn the second magnet around and move them closer together.

Move the magnets closer together.

If pushed closer to each other, what will happen to these magnets?

They will attract and 'stick' together

They will repel and push away from each other.

Which of the following describes the cause and effect relationship between gravity and falling objects?

Gravity causes objects to fall toward the center of Earth.

Gravity causes objects to repel from the center of Earth.

Gravity is caused by objects’ attraction to the center of Earth.

An object’s force is caused by gravity’s repulsion to the center of Earth.

Which object has greater acceleration when acted on by gravitational forces (only - no air resistance)? a 2 kg apple, a 7 kg bowling ball, or a 20 kg rock?

They all have the same acceleration when acted on by gravitational forces only.

An object's weight measures

the amount of gravitational force on an object.

the amount of matter in an object.

the location of an object in a gravitational field.

the distance between an object and the center of Earth.

attractive or repulsive noncontact forces between charged particles.

attractive contact forces between charged particles.

repulsive noncontact forces between uncharged particles.

attractive or repulsive contact forces between charged particles.

When are electric forces repulsive (repel)?

When they have the same kind of charge

When they have different charges

Attractive magnetic forces occur between magnets or

magnets and non-metallic materials.

A permanent magnet is

a magnet that is always surround by its magnetic field.

a magnet with varying strength.

-?- is always an attractive force, whereas -?- and -?- can attract or repel.

gravity, electricity, magnetism

magnetism, electricity, gravity

Noncontact Forces

Quiz

•

Science

•

7th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS2-4, MS-PS2-3, MS-PS2-2

+4

Standards-aligned

Charles Harvey

Used 3+ times

FREE Resource

35 questions

Show all answers

1.

DRAG AND DROP QUESTION

1 min • 1 pt

As the distance between two magnets increases (they get farther apart), the force between them: (a)

Increases

Decreases

Stays the Same

What kind of magnet can be turned on and off?

refrigerator magnet

electromagnet

magnetite

iron

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

LIKE poles on magnets

Attract

Repel

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

UNLIKE poles on magnets

Attract

Repel

In order for electricity to flow, the circuit must be

open

closed

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where does a magnet have the strongest magnetic field?

at the poles

in the middle

only at the north pole

only at the south pole

You have an unlabeled horseshoe magnet, so you do not know which end is north or south. Which investigation would give you the answer?

Putting a piece of iron next to the mystery side. If it is repelled, the mystery side of your magnet is north.

Putting a piece of iron next to the mystery side. If it is attracted, the mystery side of your magnet is north.

Putting the north side of another magnet near one of the poles of another magnet. If the north side attracts the mystery side, it is north.

Putting the north side of another magnet near one of the poles of the mystery magnet. If the north side repels the mystery side, it is also north.

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Noncontact Forces

35 questions

As the distance between two magnets increases (they get farther apart), the force between them: (a)

What kind of magnet can be turned on and off?

LIKE poles on magnets

UNLIKE poles on magnets

In order for electricity to flow, the circuit must be

Where does a magnet have the strongest magnetic field?

You have an unlabeled horseshoe magnet, so you do not know which end is north or south. Which investigation would give you the answer?

If pushed closer to each other, what will happen to these magnets?

Which of the following describes gravitational force?

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