Across
- 4. used tools like scissors,pliers,screwdriver and hammers are levers.
- 5. pulley is a small wheel with a groove around its outer edge.
Down
- 1. and axle-a wheel with a rod attached to it is known as ......
- 2. plane-an ......... is a slope which makes work easier.
- 3. a simple machine used to hold things tightly together.