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Forces & Magnets YR 7

Total questions: 20

Worksheet time: 17mins

Name
Class
Date
1.
A ____________ is a push or a pull on an object.
a)
friction
b)
force
c)
magnet
d)
gravity
2.

The close interaction between two surfaces that are sliding across each other.

a)

force

b)

friction

c)

centripetal force

d)

gravitational force

3.
What is gravity?
a)
A force
b)
Energy
c)
A push
d)
All of them
4.

If the North Pole of a permanent magnet is placed next to a compass as seen in the picture, which direction will the needle move if its tip is a north pole?

a)

Clockwise (to the right)

b)

Counter-clockwise (to the left)

c)

It will not move

d)

Need more information

5.
Electric charges that are alike _______ each other.
a)
Attract
b)
Repel
6.
If iron filings are sprinkled around the magnet, what will happen? 
a)
The filings will move away from the magnet's field.
b)
The filings within the magnetic field will show an attraction between the north and south poles.
c)
The filings will not create a pattern.
d)
The filings within the magnetic field will show how the 2 ends of the magnet are repulsive.
7.
What is one advantage of the electromagnet pictured below
a)
The magnet can be turned off when the electric current is switched off
b)
The magnet is permanent so it is more reliable
c)
The magnet is turned off when the domains align
d)
It would be more of an advantage if the magnet was permanent
8.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
9.
Magnets have a north and a south ___________
a)
shape
b)
color
c)
pole
d)
region
10.
Iron, Nickel and cobalt are all __________________ materials
a)
Shiny
b)
poles
c)
magnetic
d)
cold
11.
Which object would a magnet attract?
a)
a glass bottle
b)
a piece of paper
c)
a metal paper clip
compass
d)
a rubber eraser
magnetic field
12.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
13.
The planet earth is a giant magnet?
a)
True
b)
False
14.
An device with a magnetic needle which spins freely and generally points north
a)
Compass
b)
Magnetic Declination
c)
Thermometer
d)
Bar magnet
15.
Earths Magnetic field is created by
a)
the movement of metal in the earth core
b)
YOUR MOM!!!
c)
The movement of the earths crust
d)
Lava flowing out of the earth
16.
A measure of how much matter an object has is--
a)
weight
b)
gravity
c)
mass
d)
volume
17.
What is the definition of "weight"?
a)
measure of the force of gravity on your body
b)
the time it takes to get on a ride 
c)
the amount of matter in an object
d)
the size of an object
18.
The rougher the surface, the faster an object will travel over the surface.
a)
True
b)
False
19.

Which of the following answers is the most scientific answer for the question:


What is friction?

a)

The random force between two solids, liquids, or gases.

b)

The contact force between two solids, liquids, or gases that slide past one another.

c)

The thing that creates static electricity

d)

A force that is random

20.

Buoyancy is:

a)

When an object sinks in liquid

b)

The ability to float in some liquid material

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