1.what is energy 2.different kinds of energy 3.why do we use energy 4.how do we measure energy...

• 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

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 EE=mc(square)=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 ).

Potential energy(Potential energy( 勢能勢能 )--------Energy that is stored)--------Energy that is stored

Kinetic energy(Kinetic energy( 動能動能 )--------The energy of a moving objec)--------The energy of a moving objectt

Solar energy(Solar energy( 太陽能太陽能 )--)-- 氭氭 ----Heat and light energy from ----Heat and light energy from the sunthe sun

Nuclear energy(Nuclear energy( 核能核能 )------Energy produced by activity i)------Energy produced by activity inside the nside the

nucleus(nucleus( 核心核心 )of an atom()of an atom( 原子原子 ))

Radiant energy(Radiant energy( 放射能源放射能源 )-------Energy that travels out fr)-------Energy that travels out from its om its

source source

Chemical energy(Chemical energy( 化學能化學能 )-------Energy stored in chemical )-------Energy stored in chemical

compounds(compounds( 混合混合 ))

Heat energy(Heat energy( 熱能熱能 )-------The energy inside an object or sub)-------The energy inside an object or substancestance

(( 物質物質 ))

Light energy(Light energy( 光能光能 )-------Energy detected by the eye)-------Energy detected by the eye

Electrical energy(Electrical energy( 電能電能 )-------The energy of electricity )-------The energy of electricity

Sound energy(Sound energy( 聲能聲能 )--------Energy detected by the ear)--------Energy detected by the ear

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

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.

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 )

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.

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

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.

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.

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

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.

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

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.

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)