The document discusses different types of machines, categorizing them as either simple or complex. Simple machines like spades, scissors, and hammers are made of few pieces and use only human energy to operate. More technically advanced machines such as cars, dishwashers, radios, and computers are considered complex as they are made up of many interconnected parts and require electricity or petrol in addition to human energy to function. Complex machines are comprised of multiple components while simple machines have fewer elements and are powered solely by human force.

1. UNIT 8: MACHINES
Different machines
TEACHER: JAVIER ROBLES

2. This is a spade
Spade is a simple
machine

3. These are scissors
Scissors are a simple
machine

4. This is a hammer
Hammer is a simple
machine

5. This is a car
Car is a complex machine

6. This is a dishwasher
Dishwasher is a complex
machine

7. This is a radio
Radio is a complex
machine

8. This is a computer
Computer is a complex
machine

9. Complex machines are
made up of many pieces

10. They use human energy,
electricity o petrol to
work.

11. Simple machines are made
up of few pieces

12. They use human energy