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This energy is more eficient thanthe other fossil fuels. Is barns more cleanly than coal or crude oil, but It still contributes to global waning.

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Biomass (Alejandra): This is all things and órganic matter. It includes Woody, crops,manure of animal origin and food waste. Se burn biomass in power station yo boil water and produce steam. This Steam turns a tubine and generales electricity. Biomass production can contribuite to desforestation and global warning.

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Biomass (Alejandra): This is all things and órganic matter. It includes Woody, crops,manure of animal origin and food waste. Se burn biomass in power station yo boil water and produce steam. This Steam turns a tubine and generales electricity. Biomass production can contribuite to desforestation and global warning.

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We make crude oil into petrol for cars. Burning oil causes air pollution and contributes to climate change.

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We burn coal to get energy and to produce electricity. Coal is a major source of fuel and the biggest source of air pollution

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We can build wind farms on land and in the sea. Wind turbines are only effective in windy places

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Hydroelectric power is more than wind and sunligth and it does not cause any pollution . Building dams can destroy wildlife habitats and affect biodiversity on a areas.

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Solar energy ( Alejandra ): The sun is the cleanest surce of energy. Solar planels do not pullute the enviroment. Solar energy is effective un places with very sunny climates.

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Solar energy ( Alejandra ): The sun is the cleanest surce of energy. Solar planels do not pullute the enviroment. Solar energy is effective un places with very sunny climates.

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This form of energy is released during a chemical reaction. For example, the chemical reactions inside batteries produce electricity. Our bodies also use chemical reactions to change food into energy.

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This energy is heat that comes from the centre of the Earth. Geothermal energy only exists in areas with volcanic activity.

It is a clean energy source because it does not cantribute to the greenhouse effect and it does not pollute the air.

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All object have potential energy. This is  energy stored in the object. A tree  stores potential  energy in its wood. This enegy is released when we burn wood. The water in a lake also has potential energy. It becomes kinetic energy if the water flows into a rivers.

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This energy comes from a heated substance. When thermal energy is transferred from or to an object, we call it heat. Warmer objects have more thermal energy than cooler object. Thermal energy also moves from warmer objects to cooler objects

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1. Fossil fuels

Coal

Crude oil

Natural gas

2. Uranium

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Solar energy

Wind energy

Water energy

Geothermal energy

Biomass

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Kinetic energy

Potential energy

Mechanical energy

Thermal energy

Chemical energy

Electrical energy

Light energy

Sound energy