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