Energy lights our life, powers our vehicles, and runs water in river, cooks our food. It warms and cools our homes, plays our music, and gives us.

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Presentation transcript:

Energy lights our life, powers our vehicles, and runs water in river, cooks our food. It warms and cools our homes, plays our music, and gives us pictures on television.

Coal Oil Natural gas Water energy Nuclear energy Biomass energy Geothermal energy Wind energy Tide energy Solar energy Energy source

Energy Source Classification 1. primary energy sources and secondary energy sources 2. renewable and non-renewable energy sources 3. conventional and new energy sources 4. polluting and non-polluting energy sources

Our main energy sources are limited and will one day be used up. We cannot afford to waste too much energy. We must start to conserve energy so that it will last longer. YOU DID IT!

Primary Sources and Secondary Energy Source Like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources. It is a secondary energy source which means that we get it from the conversion of primary sources.

renewable and non-renewable energy sources These sources, such as the sun and wind, can never be exhausted and are called renewable energy sources.

conventional and new energy sources Conventional energy sources are available locally. For example,coal,oil,natural gas,nuclear energy etc. Conventional energy sources are available locally. For example,coal,oil,natural gas,nuclear energy etc. Using new energy can reduce chemical, radioactive pollution. For example,sun energy,wind energy, tide energy, Geothermal energy etc.