Simple and Complex machines

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Across
  1. 2. Something that uses energy to make work easier.
  2. 4. A simple machine that has a thick end and a thin end, used to separate or split things.
  3. 5. The fixed point on a lever.
  4. 7. A grooved wheel with a rope or chain used to lift things.
  5. 8. A simple machine made of a wedge wrapped around a cylinder; used to hold things together.
  6. 9. A machine made up of two or more simple machines working together.
Down
  1. 1. A flat surface that is higher on one end; makes moving objects up easier.
  2. 3. A machine that makes work easier with only one movement.
  3. 4. A wheel connected to an axle, used for moving things (like on a car).
  4. 5. The force that opposes motion.
  5. 6. A bar that pivots on a fixed point.