- 1. Friction is present whenever surfaces _________
A) break open
B) are smooth
C) look like simple machines
D) touch
- 2. Objects weigh more on Earth than they do the _________
A) Milky Way
B) ocean
C) moon
D) sun
- 3. The force on a magnet is called __________________
A) magneto
B) supernatural force
C) kryptonite
D) magnetic force
- 4. Forces that act on an object but cancel each other out are called ___________
A) balanced forces
B) air forces
C) unbalanced forces
D) force fields
- 5. Ships made of steel are still able to float
A) True
B) false
- 6. Levers have _________ parts
A) four
B) two
C) three
D) one
- 7. An inclined plane allows you to use ___________ force over a distance to make work easier
A) more
B) 2 times as much
C) less
D) No
- 8. Which simple machine does a flagpole make use of?
A) lever
B) inclined plane
C) screw
D) pulley
- 9. Which simple machine makes up a pencil sharpener? (the one mounted on the wall)
A) pulley
B) wheel and axle
C) inclined plane
D) lawn tractor
- 10. Machines reduce the amount of work needed to do a job
A) False
B) True
- 11. A knife and chisel are both ____________
A) screws
B) wedges
C) inclined planes
D) pulleys
- 12. What causes a ship to float in water?
A) buoyant force
B) fish
C) magnetic force
D) Aquaman
- 13. Which simple machine is part of a screw?
A) inclined plane
B) pulley
C) fulcrum
D) wheel and axle
- 14. Work uses force to move an object through a _________
A) magnetic field
B) pulley
C) wall
D) distance
- 15. A ____________ is an example of a simple machine called an inclined plane
A) pencil sharpener
B) car
C) ramp
D) flagpole
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