UNIT 8: ENERGYANDREA FERNANDEZ PEÑALVER

5º DE PRIMARIA

LIGHT ENERGY Most of the ligh on earth come frome the

sun.Light can be natural or artificial examples: bulbs and torches.

Light travels very fast.is more faster fron of energy. Travels at 300 000 kilometers per second.

Light always travel in a strainght line. Line can be absorbed,reflected or refracted.

CHEMICAL ENERGY Chemical energy is relased when a chemical

reaction occurs. Chemical reactions occurs between the pretol and oxygen. BETERIES AND FOOD are surces of chemical energy too.

SOUND ENERGY Sound is a vibration and can travel in any

directions from the source. Vibrating objet transmit into the airand reach our ear. We percive large vibrations as lound sounds as soft sounds.

Sound can travel very quickly, but not as light

KINETIC ENERGY

All moving things ,from large planets to tity atoms ,have kinetic energy is producer through motion or movement . The havier an object is, and the faster it moves.examples: car,a windsurfer or your bike.

ELECTRICAL ENERGY Electrical energy is user to power

machines. We can transformed it into ligth,sound,heat and movement.

The energy electricity comes from diferent sources is still produced by burning fossil fuels,sunligth,whind, water, biomas,nuclear power stations.

ENERGY SURCES SOLAR ENERGY

This energy is renewable and doesn”t pollute, howere solar panels can only be used in sunny

WHIND ENERGY

This enery is clean and renewable but wind turbines only work in whindy places. They can also damage habitats and kill birds.

BIOMASS

Biomass is organic material derived from living things such wood dried vegetation of food waste. This produce steam, whit turns a turbine and generates electricity

THIS ARE BIOMASS PELLETS

GEOTHERMAL ENERGY

Geotermal energía is heat Producer By the decomposition of undengroud radio active substancies. Geothermal energy is renewable and isn”t contaminatig, but it”s limited to certain geographic areas