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Sandra Toman Dominguez

on 15 April 2014

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Advantages; It´s possible to produce large amounts of energy from a small amount of nuclear fuel.
Disadvantages: If the nuclear waste is not stored in extremely safe conditions it emits radioactivity for hundreds of years that is dangerous to all living things.
Hydraulic energy
Natural gas
Nuclear energy
Advantages: This type of energy is non-polluting, it´s cheap and clean.
Disadvantages: Building power stations is very expensive, reservoirs can cover a lot of productive land and even destroy villages.Reservoirs can spoil the landscape and affect the animal and plant life in the area.If a dam breaks, there´s a risk of a catastrophe.
Gas for fuel is used in industry and in homes to produce thermal energy, and in thermal power stations to obtain electrical energy
Disadvantages: thermal power stations emit hot water that causes the temperature of river and sea water o rise.

Wednesday, April 17, 2014
Vol XCIII, No. 311
Solar energy
Solar energy can take the light and covert it into chemical energy.
solar energy is produced by thermonuclear radiation from inside the sun it can be used in various ways:
To produce hot water.
To generate electrical energy.
To produce electrical energy.
Advantages: It´s clean, big power stations are not needed and it is unlimited.
Disadvantages:It is a variable source of energy, sunlight depends on the season, climate and latitude. Solar panels are still quite expensive for general use.
Energy,unit 10
Advantages: nowadays we use it to generate electricity in conventional power stations and for central heating systems but it was also used in the past for street lighting and as a domestic fuel.
Disadvantages: When coal is burn it produce sulphur and nitrogen oxide , these react with water vapour in the atmosphere to produce acids.
Wind energy
It´s unlimited and non-polluting,the cost of building and maintaining a wind farm is low.
It´s a variable energy source and there are many regions that haven´t got much wind.Wind turbines are a hazard for birds and wind turbines produce noise pollution.

Advantages: It is a clean energy source and it is unlimited.
Disadvantages: It is a diffuse energy source. There are few places where this energy can be exploited. this energy source must be close to the surface.
geothermal energy
We can recycle organic and inorganic waste.

Disadvantages: It requires a big amount of space.It is not entirely clean and it is very expensive.
Municipal soil waste
We can recycle organic and inorganic waste.

Incineration can be dangerous because it releases toxic substances.To avoid this,filters must be used,and combustion temperatures must be above 900ºC.
The end
How a steam engine works
Water is heated and vapour is produce . The vapour goes up and moves a turbine which produce rotatory energy.
Marine energy
It is a clean energy source and it is unlimited.

Disadvantages: It is a diffuse energy source.There are few places where this energy can be exploited.
How a combustion engine works
The spark make an explosion in the combustion chamber that force the piston to move downwards moving the engine.
Advantages: Derivatives of crude oi are used in industry and heat engines.it is used to make things waterproof,Fuel,creams and lubricant.
Disadvantages: When it is accidentally reached into the sea or because oil tanker accidents. They are a hazard for marine and coastal ecosystems.
These is the end of the presentation ,I hope now you know a little more of energy.
Energy and types of energy.
principle of energy conservation
Energy is the capacity of an object or body to transform an energy source into work.
Energy in a variety of forms in all physical phenomena.It´s classified according to how it exist in nature:
Mechanical energy
Electrical energy
Electromagnetic energy
Sound energy
Chemical energy
Nuclear energy
Thermal or calorific energy
The principle of energy conservation states that energy is not created or destroyed.It´s transformed from one type into others.
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