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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
Brakes against wheels on a car allowing it to stop
B
Jumping on a trampoline
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 friction between your feet and the floor changes from sliding friction to rolling friction
B
The friction between your feet and the floor changes from static to kinetic energy
C
The water increases the friction between your feet and the floor
D
The water is a lubricant and reduces the friction between your feet and the floor
3) What has friction?
A
Only smooth surfaces
B
Only rough surfaces
C
Nothing
D
Everything
4) Which of these surfaces would have the most friction?
A
A wet road
B
Concrete
C
Ice
D
Aluminum foil
5) A word often associated with friction is
A
acceration
B
traction
C
speed
D
velocity
6) The two types of friction are
A
moving and stopping
B
kinetic and static
C
traction and slipping
D
pushing and pulling
7) A lubricant is
A
something that helps us stop moving
B
something that increases friction
C
something to use in our bones and joints
D
something that decreases friction
8) How do crickets use friction?
A
To reproduce
B
To harvest food
C
To jump
D
To make their song
9) Which of the following affects fuel consumption (how much fuel is used)?
A
brakes
B
the shape of the car
C
cup holders
D
seat belts
10) Which is a type of friction?
A
Speed
B
Motion
C
Air resistance
D
Lubricants
*select an answer for all questions
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