Tools help humans in different ways by making lives easier. Some tools are very simple with only a few parts, like a knife or hammer, while others are more complex with many parts, such as a mobile phone or drone. Whether a tool is simple or complex depends on the number of parts it contains.

1. Tools help us

2. Tools help us in different ways.
Tools and machines make our lives easier.
Some tools are very simple (a few parts)
and other are more complex (lots of
parts).

3. Examples:
This is a
knife.
This is a
hammer.

4. Examples:
This is a
saw.
pliers

5. More examples:
This is a
screwdriver.
scisso
rs
spann
er

6. How many parts do they have ?
Simple machines
or
complex machines ?

7. A mobile phone has lots of parts.
It is a complex machine.

8. A pulley has a few parts.
It is a simple machine.

9. A drone has got lots of parts.
It is a complex machine.

10. A saw has a few parts.
It is a simple machine.