1. Solar energy
1.1. energy from the Sun
2. nuclear power
2.1. energy in the nucleus of an atom
2.2. used in: France, Belgium, Slovakia
2.3. Advantages
2.3.1. an alternative to fossil fuels so it will avoid the problem of global warming
2.4. Disadvantages
2.4.1. due to international terrorism, there have to be increased security so it will not be misused for military or terrorist attacks
2.5. A nuclear power station turns the nuclear energy in uranium atoms into electrical energy
3. natural gas
3.1. a combustible mixture of hydrocarbon gases
3.2. used in: USA, Iran, China
3.3. Advantages
3.3.1. more environmental friendly than oil or coal and produces less emissions
3.4. Disadvantages
3.4.1. highly flammable and is very dangerous if used or handled carelessly
3.5. A gas power station turns the chemical energy in natural gas into electrical energy that can be used in homes and businesses.
4. crude oil
4.1. a liquid found within Earth
4.2. used in: Japan, Russia, China
4.3. Advantages
4.3.1. expansive industry that provides many job opportunities
4.4. Disadvantages
4.4.1. may pollute the environment when handled carelessly
4.5. Oil is burned under pressure to produce hot exhaust gases which spin a turbine to generate electricity.
5. coal
5.1. a combustible, sedimentary and organic rock
5.2. used in: China, USA, Germany
5.3. Advantages
5.3.1. easily transported to many parts of the world
5.4. Disadvantages
5.4.1. cost miners' lives due to cave-ins and ecplosions
5.4.2. fast depleting as it is a non-renewable source
5.5. A coal power station turns the chemical energy in coal into electrical energy that can be used in homes and businesses.
6. The ability to do work
7. Energy should be conserved so as to reduce demand for harmful and/or limited and precious sources of energy.
8. 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).
9. Ways to save electricity
9.1. switch off electrical appliances when not in use
9.2. use electrical fans instead of air conditioners
10. Kinetic energy
10.1. found in a moving object e.g. a ball when it is kicked across a field
11. tides
11.1. 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
11.2. used in: Russia, Scotland, Canada
11.3. Advantages
11.3.1. renewable source of energy and will never run out as long as the Moon and Sun still exists
11.4. Disadvantages
11.4.1. construction of tidal power plants can disrupt marine creatures migration and is very costly to be built
11.5. 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.
12. wind
12.1. the flow of gases on a large scale
12.2. used in: France, India, Italy
12.3. Advantages
12.3.1. environment friendly as it does not require any fuel to be burnt to obtain wind
12.4. Disadvantages
12.4.1. wind turbine construction can be very expensive and costly to surrounding environment during construction
12.5. Wind power is produced by using wind generators to harness the kinetic energy of wind.
13. sun
13.1. a huge glowing sphere of hot gas
13.2. used in: Germany, Spain, Japan (solar panels)
13.3. Advantages
13.3.1. clean and renewable energy source
13.4. Disadvantages
13.4.1. expensive to install the solar panels