This document discusses several simple machines: screws are used to fasten things and drill holes; wedges separate or lift objects and hold them in place; inclined planes help move heavy objects up and down heights; levers lift or move heavy objects; pulleys lift or lower heavy objects; wheels and axles are used for many applications. When simple machines are combined, they form more complex machines.

2. MACHINES

5. A screw is used to...
fasten two things.
drill holes.

6. A wedge is used...
To separate portions of
an object.
To lift something.
To hold an object in
order not to move.

7. An inclined plane helps us to move heavy objects
up and down heights.

8. A lever is used to lift or move something heavy.

9. A pulley is used to lift or low heavy objects.

10. A wheel and an axle are used for many things.

11. When you put simple machines together,
you get a complex machine.