We need tools and machines to work.
Tools and machines help people to make things more quickly.
Tools are small and they use energy from people (human energy).
Examples:
Scissors.
Machines are big and they need different types of energy:
- The Sun : a solar clock
- Wind: a windmill
- Electricity: a lamp
- Petrol: a car
- Gas: a gas cooker
Examples:
Computer
Microwave oven
We can find machines:
In the street: Traffic lights, street lights, cars ...
At home: DVD, Playstations, mobile phones, lamps, microwave ovens, washing machines...
At school: computers, smartboards, CD players...
MATERIALS
There are a lot of different types of materials:
Metal: Nails are made of metal.
Metal: Nails are made of metal.
Paper: A notebook is made of paper.
Glass: A window is made of glass.
Wood: A door is made of wood.
Fabric: A T-shirt is made of fabric.
Plastic: A bottle is made of plastic.
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