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Introduction To Non Contact Forces
Test Description: An introduction to gravity, magnetism, and electrical forces.
Instructions: Answer all questions to get your test result.
1) Even when your feet are not touching the ground, _________ pulls you toward the Earth's surface.
A
Friction
B
Magnetism
C
Electrical forces
D
Gravity
2) A non contact force that pulls objects toward each other as a result of their masses is called ______.
A
Magnetism
B
Friction
C
Gravity
D
Electrical forces
3) Which is NOT an example of a non contact force?
A
Gravity
B
Magnetism
C
Static electricity
D
Friction
4) Opposite charges _________.
A
Destroy each other
B
Combine
C
Attract
D
Repel
5) The two ends of a magnet are called _____________.
A
North and South
B
Left and Right
C
East and West
D
Positive and Negative
6) What happens when two north poles of magnets are placed together?
A
They cancel each other
B
They repel each other
C
They attract each other
D
They make the magnet twice as strong
7) Two objects have collected static electricity with the same charge. What would the objects do when placed near each other?
A
They would burst into flame
B
They would repel each other
C
They would be attracted to each other
D
They would change color
8) What makes electrical forces stronger?
A
Less charge and more distance
B
Using a bigger magnet
C
More charge and less distance
D
More mass
9) Objects that can exert a force on things without touching them all have a __________.
A
Force field
B
This is impossible. Things have to be touching to exert a force.
C
Magic
D
Invisible arms
10) A compass is a small magnet that always points north. What does this tell us?
A
Solar rays affect magnetism.
B
Earth is surrounded by a magnetic field.
C
Workers in the factory have to set each compass to make it point north.
D
Magnets are magic.
*select an answer for all questions
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