ENERGYDavid Borrego Pérez and María Fernández Melero
INDEXEnergy definition.Types of energy.Energy sources.Renewable and non-renewableenergy sources.Enviromental impact.Energy power stations.
E n e r g y D e f in it io nEnergy is the capacity of an object for doing awork.Energy can be measured in two kinds ofdifferent units:- Joules (J) 1 cal = 4.18 J.-Calories (cal)
Types of energyMechanical energy: there are twotypes of these kind of energy:-Kinetic energy: is the energy thatobjects posses when they aremoving. Ej: roller coaster Kinetic energy-Potential energy: is the energythat objects have when they movefrom their state of equilibrium. Potential energy
Ty p e s o f e ne rg yElectrical energy: these is associated to anelectric current. It makes machines which need anelectrical source work. Ej:a radioElectromagnetic energy: it is transported byelectromagnetic waves. Ej: Luminous energy.
Ty p e s o f e n e r g ySound energy: It is produced in the form ofsound waves and it is transmited throughvibrations.
TYPES OF ENERGYChemical energy: It can be released or absorbedin the time it is suffering chemical processes. Chemical energy as plants making photosyntesisNuclear energy: It is stored in the nuclei of atomsit is also released in nuclear reactions.
Types of energyThermal or calorific energy: When particlesvibrate in matter energy is produced. Theseenergy is measured in temperature. We use a thermometre to measure temperature
ENERGY SOURCESAn energy source is any natural resource thatprovides different types of energy, it can beused in different ways depending on itspurposes. There are two types of energysources: non-renewable and renewable energysources Examples: Wind Sunlight Water
NON-RENEWABLE ENERGY SOURCES Are those energy sources which can run out.Nuclear energy: it is stored in the nuclei of atoms.These are released in two kinds of reactions-Nuclear fission-Nuclear fusion
NON-RENEWABLE ENERGY SOURCESCoal:There are two types of coal mines:Open cast mines: where coal is extracted in thesurface of the earth.Underground mines: where the mineral isextracted under the surface of the earth. miners
NON-RENEWABLE ENERGY SOURCESPetroleumIts a source of energy that is foundunderground its extracted by oil rigs. Itsderivates are:-Liquid fuels (Petrol and diesel)-Liquiefied gases (Methane, ethane andbutane)-Fuel oil-Light components (Vaseline)-Heavy components (Paraffin) A fuel station
NON-RENEWABLE ENERGY SOURCESNatural gas: it is formed from descomposedplants and animals most of natural gas is foundunderground.It is used to produce thermal energy. Natural gas is used for gas cookers
RENEWABLE ENERGY SOURCES Renewable energy sources come from natural resources which are unlimited. Hydraulic energy: This energy comes from the movement made by the pass of the water in dams.Water movement is transforminto mechanical energy
RENEWABLE ENERGY SOURCESSolar energy: this energy comes from sunlight, although the sun is a star and some day it would disappear we conssider it to be a renewable energy source.Solar energy is catched by photovoltaic solar cells and transformed into electricity Photovoltaic solar cells
RENEWABLE ENERGY SOURCESWind energy: it is used to move wind turbines which transform mechanical energy into electrical energy.Marine energy: it can be extracted from tides, waves and sea temperature. Wind turbines Ocean thermal energy plant
RENEWABLE ENERGY SOURCESOther types of renewable energy sources are:Geothermal energy.Biomass. Geothermal power stationMunicipal solid waste.
ENVIROMENTAL IMPACT Greenhouse effect: when we burn fuels we produce carbon dioxide these gas doesn´t allow sunrays to get out of the earth atmosphere producing the greenhouse effect. Co2 Co2The poles melt with high temperatures
ENVIROMENTAL IMPACTAcid rain: this is a type of rain contaminated by pollution.Oil spills: when petrolleum is realeased to the ocean as an accident.Nuclear waste: it is radioactive and harmful for living beings. Sea birds suffer the impact of oil spillsWater temperature: thermal power station increased the temperature of water, and this is dangerous
Energy Power StationsIn power stations water is heat to very high temperatures and water vapour is produced. This water vapour moves turbines wich convert mechanical energy into electricity. An energy power station.
WIND TURBINESWind turbines usually produced renewableenergy, but now a French company discovereda new function for these structures.This company has modified the traditional windturbine so it can also manufactured drinkingwater with humid air. They say that the next stepwill be to create turbines which provided waterto cities. A new wind turbine
WIND TURBINESThe technology works by generatingelectricity in the traditional way of windturbines.The water generated is purified and filteredbefore its used or consumed. A wind turbine from the French company
THE END María Fernández Melero and David Borrego Pérez 2ºA