Energy

Physics project JSS Group 7 class 2-4

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Energy by Mind Map: Energy

1. Solar energy

1.1. energy from the Sun

2. tides

2.1. the rise and fall of sea levels caused by the combined effects of the gravity exerted by the Moon and the Sun and the rotation of Earth

2.2. used in: Russia, Scotland, Canada

2.3. Advantages

2.3.1. renewable source of energy and will never run out as long as the Moon and Sun still exists

2.4. Disadvantages

2.4.1. construction of tidal power plants can disrupt marine creatures migration and is very costly to be built

2.5. Large underwater turbines are placed in areas with high tidal movements, and are designed to capture the kinetic movement of the ebbing and surging of ocean tides in order to produce electricity.

3. nuclear power

3.1. energy in the nucleus of an atom

3.2. used in: France, Belgium, Slovakia

3.3. Advantages

3.3.1. an alternative to fossil fuels so it will avoid the problem of global warming

3.4. Disadvantages

3.4.1. due to international terrorism, there have to be increased security so it will not be misused for military or terrorist attacks

3.5. A nuclear power station turns the nuclear energy in uranium atoms into electrical energy

4. wind

4.1. the flow of gases on a large scale

4.2. used in: France, India, Italy

4.3. Advantages

4.3.1. environment friendly as it does not require any fuel to be burnt to obtain wind

4.4. Disadvantages

4.4.1. wind turbine construction can be very expensive and costly to surrounding environment during construction

4.5. Wind power is produced by using wind generators to harness the kinetic energy of wind.

5. sun

5.1. a huge glowing sphere of hot gas

5.2. used in: Germany, Spain, Japan (solar panels)

5.3. Advantages

5.3.1. clean and renewable energy source

5.4. Disadvantages

5.4.1. expensive to install the solar panels

5.5. As light strikes the semiconductor of the solar panel, light is converted into electricity that flows through the circuit.

6. natural gas

6.1. a combustible mixture of hydrocarbon gases

6.2. used in: USA, Iran, China

6.3. Advantages

6.3.1. more environmental friendly than oil or coal and produces less emissions

6.4. Disadvantages

6.4.1. highly flammable and is very dangerous if used or handled carelessly

6.5. A gas power station turns the chemical energy in natural gas into electrical energy that can be used in homes and businesses.

7. crude oil

7.1. a liquid found within Earth

7.2. used in: Japan, Russia, China

7.3. Advantages

7.3.1. expansive industry that provides many job opportunities

7.4. Disadvantages

7.4.1. may pollute the environment when handled carelessly

7.5. Oil is burned under pressure to produce hot exhaust gases which spin a turbine to generate electricity.

8. coal

8.1. a combustible, sedimentary and organic rock

8.2. used in: China, USA, Germany

8.3. Advantages

8.3.1. easily transported to many parts of the world

8.4. Disadvantages

8.4.1. cost miners' lives due to cave-ins and ecplosions

8.4.2. fast depleting as it is a non-renewable source

8.5. A coal power station turns the chemical energy in coal into electrical energy that can be used in homes and businesses.

9. The ability to do work

10. Types of energy

10.1. gravitational potential energy

10.2. thermal energy

10.3. elastic potential energy

10.4. light energy

10.5. electric potential energy

10.6. chemical potential energy

10.7. sound energy

10.8. kinetic energy

11. Energy cannot be destroyed or created. It can only transform from one form to another. The total energy of the object remains the same.

12. Energy should be conserved so as to reduce demand for harmful and/or limited and precious sources of energy.

13. The best source of energy which is most suitable for Singapore's usage is Solar energy (the Sun) as Singapore experience Summer all year round and therefore we can generate more electricity. In addition, solar energy is a renewable energy so it will never run out and we can save resources and reduce the use of nuclear power, fossil fuels and coal which are harmful(for nuclear power) and limited(for fossil fuels and coal).

14. Ways to save electricity

14.1. switch off electrical appliances when not in use

14.2. use electrical fans instead of air conditioners

15. Kinetic energy

15.1. found in a moving object e.g. a ball when it is kicked across a field