unit 8
Post on 22-Aug-2015
167 Views
Preview:
TRANSCRIPT
• EnergyEnergy is everything that produces changes in things. There are different forms:• Light.• Heat.• Mechanical.• Electrical.• Chemical• Nuclear.A transformation of energy is when one form of energy changes into another.
• Energy sourcesEnergy sources are the natural resources from which we obtain the energy we use. They can be non-renewable or renewable.We exhaust non-renewable energy sources because they do not have time to renew themselves. The main ones are fossil, fuels and radioactive substances.We cannot exhaust renewable energy sources because they renew themselves continually. Some examples are the Sun, wind, moving water and biomass.
Lesson vocabularyEnergy: energíaThings: cosasLight: luzMechanical: mecánicaChemical: químicaTo change: cambiarEnergy sources: fuentes de energíaNatural resources: recursos naturalesTo use: utilizarNon-renewable: no renovableRenewable: renovableFuel: combustibleWind: vientoPower station: central electricaHydro-electric power station: central hidroeléctricaSolar panels: panel solarBiomass: biomas.To exhaust: agotarThemselves: ellos mismos
top related