ENERGYENERGYALEJANDRA LÓPEZ GARCÍA

5º PRIMARIACURSO 2014/2015

FORMS OF ENERGYFORMS OF ENERGYLight energy Can be natural or artificial. It

travels 300000 kilometers per second.It´s made up ofseven different colours.It iluminate objects and allows us to see

shapes, colours and sizes.It always travels in straight lines, when that

happens , light can be absorbed, reflected or refracted, depending of what kind or surface ir hits. When light hits an opaque object, When light hits an opaque object, are absorbed and others are reflected. are absorbed and others are reflected. The colour we see is the colour that the The colour we see is the colour that the object reflects.object reflects.

Chermical energy It is released when a chermical reaction occurs. Chermical energy sometimes are transformed into kinetic energy. Batteries and food are sources of chermical energy too.

Sound energySound energy It is a vibration and can be travel in any direction from the source. Vibrating objects transmit this vibrationgs into air. The vibrations move through the air until they reach our ear. We perceive large vibrationsas loud sounds and small vibrations as soft sounds. Sound can travel very quickly, as fast as light. Sound can travel througt gases, liquids and solids, even if they are opaque. Sound can´t travel througt a vacuum because in vacuume there vare no particles to vibrate.

Kinetic energyKinetic energy all moving things have kinetic energy. This energy is produced through motion or movement.

Electrical energyElectrical energy it is used to power machines, can tranformed it into light, sound, heat and movement. It can come from burning fossil fuels, sunlight, wind, water and biomass. It is also produced in nuclear power stations.

Thermal energyThermal energy Flows from a warm substances to a cooler substances. Sources: The sun and fossil fuels (like coal, oil and gas)

ENERGY SOURCES:ENERGY SOURCES: Renewable:Renewable: Water: It does not pollute Solar: t does not pollute, but solar panels can only be used in

sunny climates. Wind: Damage habitats and kill birds. Biomass: Organic materials from living things such as wood. Geothermal: Heat produced by the decomposition of underground

radioactive objects.

No-renewable:No-renewable: Fossil Fuels: Coal, oil and natural gas Uranium: Nuclear power stations use a radioactive metal, called

uranium to generate electricity.

ELECTRICITY:ELECTRICITY: All objects contain electrical charges whith can be positive or negative If an object contain more positive charges than negative charges, it have a

positive charge If an object contain more negative charges than positive charges, it have a

negative charge. Objects with the opposite electrical charge atract. Objects with the same electrical charge repel Tipes: Current electricity: When an electrical charge moves in an electrical conductors,

we have current electricity. Static energy: It does not flow. Examples a lightning, hair sticking up. We can produce it when we rub two non metal objects together. Magnetism: A magnet is an object whit can attract certain metals. Magnetism: Magnetism: Is the habilty to attract metals. All magnets have two poles, at the end of the poles attract metal objects