Machines

1. COMPLEX AND
SIMPLE MACHINES
Natural Science 5th 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. LEVERS
The fulcrum is in the middle

8. LEVERS
The load is in the middle

9. LEVERS
The effort is in the middle

10. COMPLEX MACHINES

11. 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)

12. ACTIVITIES
1. Classify these machines in simple
or complex.
2. Write load, fulcrum or effort in this
levers. Then, say if it is 1st genre,
2nd or 3rd
lever – car – computer – hammer – pulley – clock –
bicycle – ramp – wheel - telephone

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