complex 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 OR COMPLEX
MACHINES


5. SIMPLE MACHINES

6. LEVERS

7. COMPLEX MACHINES

8. 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)

9. 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

10. JOURNAL
 Write and draw three examples simple and
three of complex machines