HOMEWORK

WATER

• Water turbines.
• Water turbines are propellers that are mover by the current of the waves.
• This then turns the motor to generate power.
• Water power is unlimited as waves are infinite.
• The only real disadvantage is that it is bad for boats and it can kill animals.

SUN

• Solar cells use sunlight to build up power.
• They can be directly used to heat running water in pipes.
• The advantages are that they are eco friendly.
• The disadvantage is that they are hard to destroy.

EARTH

• Geothermal energy is warmth that is released from under the earths surface.
• This is then converted into electrical energy.
• I don't know anything else.

WIND

• Wind turbines are used to harness wind power.
• They spin a motor that builds power.
• This is then transferred into cables and used to power houses.