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