Across
- 2. When we put simple machines together we make a _____
- 6. People could communicate by sending coded messages. It was the fastest way of communicating over long distances
- 8. We use ___ to hold things together
- 9. ___ ___ have no moving parts or few moving parts
- 10. It is an object with a slanted surface. We can cut things easily or use it to stop something moving
Down
- 1. It is a surface that goes from a low level to a high level. We use it to move heavy objects up and down
- 3. This invention started the Industrial Revolution. The engine used water, vapour or steam to do work. It powered trains and ships and also machines in factories
- 4. It is made up of a rigid bar and a fulcrum. It makes easier to lift an object
- 5. It is made up of a wheel which turns around an axle. We use it to move things across the ground more easily
- 7. We use a ____ when we have to lift or lower something heavy. It uses a Wheel and a rope