science words 8-16

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Across
  1. 2. a ramp that goes around a post
  2. 3. and axe when a rod turns a wheel
  3. 6. plane a ramp
  4. 7. a pole or stick that is used to push something up
  5. 8. machine when you put two simple machines together to make a new machine
Down
  1. 1. looks like a ramp but it moves
  2. 2. machine a tool that does work with one movement
  3. 4. how well a machine does work
  4. 5. when a rope fits in a wheel and is used to lift something up