2. 1.What is energy 2.Different kinds of energy 3.Why do we use energy 4.How do we measure energy 5.Advantages and disadvantages of energy 6.Pollution problems of energy 7.Saving energy 8.Conclusion 9.Comment

4. E=mc(square) Everything in the universe( 宇宙 )is either or matter. Einstein realised that one could become the other and vice versa( 反過來也是一樣 ), immortalized( 享有不朽的名聲 )in his famous equation E=mc(square).E is energy, M is mass (matter) and C is the velocity( 速率 )of light. It means that energy and matter are equivalent.Energy is come from fossil( 燃料 )and it can’t renewable( 更新 ).

6. Potential energy( 勢能 )--------Energy that is stored Kinetic energy( 動能 )--------The energy of a moving object Solar energy( 太陽能 )-- 氭 ----Heat and light energy from the sun Nuclear energy( 核能 )------Energy produced by activity inside the nucleus( 核心 )of an atom( 原子 ) nucleus( 核心 )of an atom( 原子 ) Radiant energy( 放射能源 )-------Energy that travels out from its source source

7. Chemical energy( 化學能 )-------Energy stored in chemical compounds( 混合 ) compounds( 混合 ) Heat energy( 熱能 )-------The energy inside an object or substance ( 物質 ) ( 物質 ) Light energy( 光能 )-------Energy detected by the eye Electrical energy( 電能 )-------The energy of electricity Sound energy( 聲能 )--------Energy detected by the ear

9. Energy is the power that we use to do things.We have to convert( 改變 )it into another form to make it work for us.We need energy because our lives need energy and we use it in two ways:They are directly and indirectly.For the first of these two,we use the source to directly power whatever work we want done.But we also use energy indirectly by converting one form into another more usable( 有 用的 )form:electricity.

10. Our supply of depends( 依靠 ) greatly on coal( 煤 )and crude( 未提煉 )oil, which we burn in power stations and use to make fuels( 燃料 ). Coal and oil are also a rich source of chemical, form which we make plastics, dyes( 顏料 )and other synthetic( 人工製造 )products that we use every day.

11. Different kinds of oil and gas: 1.Fossil fuel ( 化石燃料 ) 2.Natural gas 3.Coal( 煤 ) 4.Petroleum( 石油 ) 5.Producer gas 6.Charcoal( 木炭 ) 7.Creosote( 木餾油 )

12. Use of fuel in transportation: 1.Most ships are powered by by heavy diesel or fuel oil. 2.Most cars are powered by gasoline(petrol). 3.Jet aeroplanes use kerosene for fuel. 4.Lorries and diesel trains run on diesel oil.

14. We need to be measure the different kinds of energy-for reasons both of convenience( 便 利 )and practicality( 實物 ).

16. Different kinds of energy make different things happen. Some forms of energy are more useful than others. For example, electricity is a much higher quality form of energy. It can be used for many more things,such as powered by heavy diesel or fuel oil. Most cars are powered by gasoline(petrol). Jet aeroplanes use kerosene for fuel. Lorries and diesel trains run on diesel oil. Coal and oil are also a rich source of chemicals, from which we make plastics, dyes, and other synthetic products that we use every day.

17. As power stations burning large coal and oil to heat energy, it caused many environmental pollution problems such as acid rain( 酸雨 ), the greenhouse effect and the nuclear waste to this world. Therefore, energy conservation would mean less burning of fossil fuels, and so would reduce pollution.

19. Power stations using coal and oil are a major source of environmental problems such as acid rain, the greenhouse effect and the nuclear waste.

21. We need energy to heat homes and power machines.We get this energy mainly by burning fuels such as natural gas,oil and coal.These fuels are in limited supply and we should conserve the energy sources so that the fuels will last longer. This can be done by making machines and homes more efficient So that they consume less energy. Energy conservation would mean less burning of fossil fuels and so would reduce pollution.

22. In this project, we know that energy is very important in our day life. We should not waste it because we use it for doing everything. We also know that energy will be consumed. Therefore we should cherish it!

23. We think that we must use the energy in advantages form, and save the energy.We hope anyone who had looked this project, he/she can know more about energy and know how to save energy, then the world will be better.

24. 1A Chan Yu Ching (6) Cheung Tsz Kin (8) Chu Kai Tik (9) Leung Wan Kit (15) Ng Chak Him (17) Lam Ka Po (29) Wong Joey (41)