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