Simpe Machines

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Across
  1. 4. When we want to attach two things which simple machine do we use ?
  2. 5. An axe is which type of simple machine ?
  3. 6. What is the base of the lever ?
  4. 7. Dumbles are which type of simple machine ?
Down
  1. 1. How many types of pulleys are there ?
  2. 2. What type of simple machine is a ramp ?
  3. 3. How many types of levers are there ?