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Gravity, Magnets, and Static Electricity

Total questions: 25

Worksheet time: 50mins

Name
Class
Date
1.
Joe has an idea to cut a bar magnet in half so that he can have one magnet with a north pole and one magnet with a south pole. What is wrong with this idea?
a)
It is impossible to cut a magnet in half.
b)
It is impossible to create an extremely small magnet.
c)
It is impossible to create a magnet with only one magnetic pole.
d)
It is impossible to separate two opposite magnetic poles once they are in contact with each other.
2.

Where is the magnetic force the strongest?

a)

Position A

b)

Position B

c)

Position C

d)

Position D

3.
Magnetic field lines that curve away from each other show __________.
a)
Repulsion
b)
Attraction
c)
A magnetic domain
d)
Where the magnetic field is strongest
4.
The force of gravity on the surface of the Moon is about one-sixth the force of gravity on the surface of Earth. Which describes the relationship of mass and weight of an object on the Moon compared to that on Earth?
a)
Both mass and weight are greater on the Moon.
b)
Both mass and weight are less on the Moon.
c)
Mass is the same, but weight is less on the Moon.
d)
Weight is the same, but mass is less on the Moon.
5.
A soft metal core that becomes magnetic when an electric current  passes through coils around the core
a)
Magnet
b)
Electromagnet
c)
Electricity
d)
Copper Wire
6.
Which statement is true about magnetic forces?
a)
Distance does not affect the strength of the force field
b)
The charge of the magnet affects the strength of the force field.
c)
There is an east pole and west pole to every magnet
d)
Distance and the strength of the magnet affect the strength of the force field
7.

Distance and mass are two factors that affect

a)

Gravitational Force Fields

b)

Magnetic Force Fields

c)

Electric Force Fields

d)

Electrostatic Force Fields

8.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
9.

What option best describes this field?

a)

An electric field generated by two positive charges. They would attract each other.

b)

An electric field generated by two negative charge which would attract each other.

c)

An electric field generated by two opposite charges. They would attract each other.

d)

There is no force field present.

10.
Which is a factor that affects the strength of gravitational, magnetic, and electrostatic force fields?
a)
Mass
b)
Volume
c)
Distance
d)
Density
11.
Which planet has the strongest gravitational pull towards the Sun?
a)
Jupiter
b)
Neptune
c)
Mercury
d)
Earth
12.
To increase the strength of an electromagnet you should
a)
Increase the number of coils
b)
Increase the voltage of the battery
c)
Use a strong core
d)
All of the above
13.
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
14.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
15.

Which planetary body has the GREATEST gravitational pull?

a)

Jupiter

b)

Neptune

c)

The Moon

d)

Earth

16.

3) Gravity on the moon is about 1/6th the gravity felt on the earth. This is because

a)

the moon is so far away from the earth.

b)

the moon is much less massive than the earth.

c)

the earth has a molten core and the moon doesn't.

d)

the moon is so much further from the sun than the earth.

17.

Which direction of the bar magnet will create the magnetic force field in the picture above?

a)
b)
c)
d)
18.

Jacob floated a long steel sewing needle on a small piece of cork in a glass of water. He noticed that as he turned the glass around, the cork and needle continued to point toward his backyard. Even after he turned the small floating cork around gently, the needle finally pointed toward the backyard. What is the MOST LIKELY conclusion Jacob will draw?

a)

There is a large magnet in the backyard.

b)

Jacob’s backyard is on the north side of his house.

c)

The backyard is downhill from where Jacob is standing.

d)

A gentle breeze is causing the needle to point toward the backyard.

19.

The force of repulsion between two like-charged particles will increase if

a)

the distance between the charged particles is increased.

b)

the distance between the charged particles is decreased.

c)

the magnitude of the charge on both the particles is decreased.

d)

the magnitude of the charge on one of the particles is decreased.

20.

When a student combed his dry hair for a long time, his hair began to stand up. Which of these has MOST LIKELY happened?

a)

The comb and hair have become charged with similar charges.

b)

The comb and hair have become charged with opposite charges.

c)

The comb has become charged, but the hair has remained neutral.

d)

The hair has become charged, but the comb has remained neutral.

21.
Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
a)
The balloons will repel each other.
b)
The balloons will attract each other.
c)
The balloons will become positively (+) charged.
d)
The balloons will pop.
22.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
23.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
24.
How do electrons differ from protons?
a)
They are the same thing
b)
Electrons hold a negative charge and protons hold a positive charge.
c)
Electrons are positively charged and protons are negatively charged.
d)
Protons are neutral 
25.
Walking across a carpet is an example of charge being transferred by
a)
friction.
b)
induction.
c)
contact.
d)
static electricity

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