- 1. Friction is present whenever surfaces _________
A) are smooth B) break open C) touch D) look like simple machines
- 2. Objects weigh more on Earth than they do the _________
A) ocean B) sun C) moon D) Milky Way
- 3. The force on a magnet is called __________________
A) supernatural force B) kryptonite C) magnetic force D) magneto
- 4. Forces that act on an object but cancel each other out are called ___________
A) unbalanced forces B) force fields C) balanced forces D) air forces
- 5. Ships made of steel are still able to float
A) false B) True
- 6. Levers have _________ parts
A) two B) one C) three D) four
- 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) lever B) screw 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) pulley C) lawn tractor 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) inclined planes B) screws C) wedges D) pulleys
- 12. What causes a ship to float in water?
A) magnetic force B) buoyant force C) fish D) Aquaman
- 13. Which simple machine is part of a screw?
A) fulcrum B) wheel and axle C) inclined plane D) pulley
- 14. Work uses force to move an object through a _________
A) wall B) distance C) pulley D) magnetic field
- 15. A ____________ is an example of a simple machine called an inclined plane
A) flagpole B) pencil sharpener C) ramp D) car
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