Complex and simple machines

1. COMPLEX AND SIMPLE MACHINES
N A T U R A L S C I E N C E
3 R D O F P R I M A R Y

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