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6. ENERGY (Energy around us. We depend on energy (Factories and power…
6. ENERGY
Energy around us.
We depend on energy
Factories and power plants
Machines with electricity
Transport
Cars with petrol and trains with electricity
At home
PC, TV, lamps with electricity
In the countryside
Tractors with petrol
Energy and energy transformation
Types of energy
Chemical energy
Electrical energy
Light energy
Kinetic energy
Heat energy
Sound energy
Energy changes
See page 99 for energy transformation
Sources of energy
Types
Renewable
never run out
Solar: Sun procudes other types of ebergy
Hydroelectric: water procuces electricity
Wind: procuces electricity
Non-renewable
they run out
Gas: by digging holes
Oil: to produce petrol
Coal: from mines
Energy and enviroment
Consequences of wasting energy
burning fossils release chemicals
solar panels change natural landscape
Oil spilled at the sea
Save energy
Close the doors and windows
Turn off the lights
Turning off electrical equipment
Walk insted using the car.
