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