COMPLEX AND SIMPLE MACHINES

Natural Science 5th of Primary

SIMPLE MACHINEA simple machine has one or few

components

Example: lever, hammer, scissors, screw, pulley, ramp

COMPLEX MACHINESA complex machine has a lot of

elements

Example: bicycle, car, computer, mobile phone, clock

SIMPLE OR COMPLEX MACHINES

SIMPLE MACHINES

LEVERS

LEVERS

The fulcrum is in the middle

LEVERS

The load is in the middle

LEVERS

The effort is in the middle

COMPLEX MACHINES

QUESTIONSWhat 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)

ACTIVITIES1. 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

JOURNALWrite and draw three examples

simple and three of complex machines