TYPES OF ENERGY
Chemical Energy
Light Energy
Electrical Energy
Kinetic Energy
Batteries and food are sources of chemical energy too
Looks like white ,but is made up of seven different colours
Light always travels in straight line until something gets in its way.When that happens, light can be absorbed,reflected or refracted depending on what kind of surfaceit hits
Light is the fastest form of energy,it travels at 300000 kilometres per second
Examples of kinetic energy include a moving car, a windsurfer or your bike when it is in movement.Living things have kinetic energy too
Most of the light on Earth comes from de sun.Light sources can be natural or artificial
Light iluminates objects an allow us to see different shapes,colours and sizes
All moving things have kinetic energy.This energy is produced trough motion or movement. The heavier an object is , and the faster it moves, the more kinetic energy it has
Chemical energy is released when a chemical reaction occurs
When cars burns petrol, a chemical reaction occurs between the petrol and oxygen. This chemical energy is then transformed into kinetic energy
The energy to generate electricity comes from different sources.A lot of our electricity is still produced by burning fossil fuels
Electricity can also be generated using energy from sunlight,wind,water and biomass.It is also produced in nuclear power stations
Electrical energy is used to power machines. We transform it into light,sound, heat or movement
Thermal Energy
Sound Energy
Sound can travel very quickly
We perceive large vibrations as loud sounds and small vibrations as soft sounds.
Sound is a vibration and can travel in any direction from the source.Vibrating objects transmit these vibrations into the air.The vibrations move through the air until they reach our ear
Sound can travel trough gases, liquids and solids, even if they are opaque .Sound can´t travel trough a vacumm because in a vacuum there are no praticules to vibrate
The sun is the main source of heat on Earth. Other sources include fossil fuels,which we use to warm our houses and cook our food.These fuels come from under the ground and include coal,oil and gas
Thermal energy flows a warm substance to a cooler substance.This flow of thermal energy is called heat.A change in the thermal energy of a substance can also make the substance change state
