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Friction
Test Description: North Carolina 7th Grade Science
Instructions: Answer all questions to get your test result.
1) Which is NOT an example of friction?
A
Jumping on a trampoline
B
Brakes against wheels on a car allowing it to stop
C
Spikes on football cleats so the player won't slide
D
Your shoe against the pavement allowing you to stop
2) Why is it easy to slip on a floor when it's wet?
A
The water is a lubricant and reduces the friction between your feet and the floor
B
The water increases the friction between your feet and the floor
C
The friction between your feet and the floor changes from sliding friction to rolling friction
D
The friction between your feet and the floor changes from static to kinetic energy
3) What has friction?
A
Nothing
B
Only smooth surfaces
C
Only rough surfaces
D
Everything
4) Which of these surfaces would have the most friction?
A
Concrete
B
Aluminum foil
C
A wet road
D
Ice
5) A word often associated with friction is
A
speed
B
velocity
C
traction
D
acceration
6) The two types of friction are
A
moving and stopping
B
traction and slipping
C
pushing and pulling
D
kinetic and static
7) A lubricant is
A
something that helps us stop moving
B
something that decreases friction
C
something that increases friction
D
something to use in our bones and joints
8) How do crickets use friction?
A
To jump
B
To make their song
C
To harvest food
D
To reproduce
9) Which of the following affects fuel consumption (how much fuel is used)?
A
seat belts
B
brakes
C
the shape of the car
D
cup holders
10) Which is a type of friction?
A
Lubricants
B
Speed
C
Air resistance
D
Motion
*select an answer for all questions
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