par Aidan Dean Il y a 15 années
245
Plus de détails
THE ABILITY TO MAKE THINGS MOVE
ENERGY CANNOT BE CREATED OR DESTROYED ONLY TRANSFORMED
nuclear
gas
coal
oil
wood
geothermal
solar
wind
energy types are transformed from one type to another eg when a falling rock hits the ground, kinetic energy is transformed into sound energy.
The blue lines show some common energy transformations
The energy of something moving eg a car rolling down a hill has kinetic energy
Stored energy eg a boy sitting at the top of a slippery dip has energy stored as a result of his position
chemical energy is stored until it is converted eg in food it is converted to heat when it is eaten; in a match head it is converted to light and heat when it is moved against the box; to electrical energy when a battery is connected to a circuit
also springs
when you pick up a pen and hold it up, you give it gravitational potential energy
can be produced by chemicals reacting, respiration in cells, movement of two objects against each other ie friction
