Simple Machines

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Across
  1. 1. A pulley helps us lift things ____ (easier / harder?)
  2. 3. A ramp used to load boxes into a truck
  3. 6. Turning this simple machine makes it go deeper into wood (a spiral tool)
  4. 7. A wedge is used to push things apart or to ____ things
  5. 8. A simple machine with a spiral groove, like a jar lid
  6. 10. A round object that turns on a rod
  7. 12. A knife is an example of this simple machine
  8. 13. A cart or bicycle uses this simple machine to roll
  9. 14. A wheel with a rope around it that helps lift things
  10. 15. Simple machines help us use less ____
  11. 17. You turn this to open a bottle — a type of screw
Down
  1. 2. A flat, slanted surface used to move objects up or down
  2. 4. A doorknob uses this simple machine: wheel and ____
  3. 5. This machine lifts the flag on a flagpole
  4. 8. A playground tool that works as a lever (like a see-___)
  5. 9. A crane uses a pulley to lift heavy ____
  6. 10. A tool made of two slanted surfaces that meet in a sharp edge
  7. 11. A long bar that pivots on a fulcrum
  8. 15. The point where a lever moves is called the ____
  9. 16. The Egyptians used this simple machine to build pyramids