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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
SIMPLE MACHINE
A simple machine has one or few components
Example: lever, hammer, scissors, screw, pulley, ramp
COMPLEX MACHINES
A complex machine has a lot of elements
Example: bicycle, car, computer, mobile phone, clock
SIMPLE MACHINES
LEVERS
COMPLEX MACHINES
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)
ACTIVITIES
1. Classify these machines in simple or complex.
1. Write load, fulcrum or effort in this levers
lever – car – computer – hammer – pulley – clock –
bicycle – ramp – wheel - telephone
JOURNAL
Write and draw three examples simple and three of complex machines

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Complex and simple machines