Simple Machines
Across
- 2. This can be a push or a pull on an object. Machines work by changing the amount of this needed to do something.
- 3. Simple machines are devices with few or no moving parts that make it easier for us to do ______.
- 4. The _______ plane is a flat surface with one end higher than the other, allowing heavy objects to slide up to a higher point rather than be lifted.
- 6. This simple machine consists of a round disk, known as a _____, with a rod through the centre of it, known as the axle.
- 7. This simple machine changes a gentle turning force into a strong forward force. It is made up of an inclined plane wrapped in a spiral around a pole.
Down
- 1. A ______ is a bar or board that rests on a support called a fulcrum. A downward force on one end can be transferred and increased in an upward direction at the other end, allowing a small force to lift a heavy weight.
- 3. Which simple machine consists of two inclined planes which meet to form a sharp edge and can split things apart, or hold things still.
- 5. What type of simple machine uses a wheel with a groove in it for a rope, and makes it easier to lift things?
- 7. How many basic types of simple machines are there?