Complex and simple machines

1. COMPLEX AND SIMPLE
MACHINES
Natural Science 4th of Primary

2. SIMPLE MACHINE
 A simple machine has one or few
components
Example: lever, hammer, scissors,
screw, pulley, ramp

3. COMPLEX MACHINES
 A complex machine has a lot of
elements
Example: bicycle, car, computer, mobile
phone, clock

4. SIMPLE MACHINES

5. LEVERS

6. COMPLEX MACHINES

7. QUESTIONS
 What kind of machine is a computer?
 What kind of machine is a hammer?
 What are the three parts of a lever?
 Let’s think in examples of simple
machines (Write 5 words)
 Let’s think in examples of complex
machines (Write 5 words)

8. ACTIVITIES
1. Classify these machines in simple
or complex.
2. Write load, fulcrum or effort in this
levers
lever – car – computer – hammer – pulley – clock –
bicycle – ramp – wheel - telephone

9. JOURNAL
 Write and draw three examples simple
and three of complex machines