Simple Machines

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Across
  1. 3. A simple machine that gets thinner at one end that is used to split material such as wood. A knife is an example of a wedge.
  2. 4. A simple machine that has a gently sloped surface so it can be used to move objects upwards with less force. Ramps are examples of inclined planes.
  3. 6. A plank that rests on something underneath and moves up and down. A seesaw is a lever.
Down
  1. 1. Tools that make difficult tasks easier by changing the direction of the force or the amount of force needed to do something.
  2. 2. A wheel and rope that can change the direction of a force. A flagpole uses a pulley to raise the flag.
  3. 3. A simple machine used to move objects across a distance using a round part (wheel) and a long part (axle). Cars have wheels and axles.
  4. 5. An inclined plane wrapped around a center rod. An example of a screw is a spiral staircase.