Energy Flashcards
(25 cards)
Unit of energy
Joules
Energy
is the ability to do work
Potential energy
Stored energy that is just waiting to do work such as a coiled spring or a elastic band
Kinetic energy
The energy that moving things I.e, a windmill turning or a car moving
Heat energy
Heat is energy because it can cause things to move
Hot air
Hot air causes a hot air balloon to rise , heat ina steam engine moves trains !
Light energy
Light can move in a crooked radiometer or ina solar powered calculator, plants use
Ought to make food
Sound energy
If you put your head near a loud speaker you can feel that air is being moved by sound energy
Electrical energy
This energy can make things like extractor fans move . It is the flow of electrons around a circuit
Chemical energy
This is the type of energy stored in fuels such as coal and oil , it is also stored in the food we eat and in batteries
Nuclear energy
This energy is stored in the nucleus of atoms , the energy that comes from the sun
Law of conservation of energy
Energy cannot be created or destroyed it can only be converted from one form to another
Circuits
A circuit is made up of a battery , some wires and different types of equipment can be used to observe energy conversions
Renewable energy
Energy sources that are constantly being replaced b nature
Renewable energy sources
Solar energy
Hydro electric energy
Wind energy
Wave energy
Biomass energy (some plants produce oils others can produce fuels such as alcohol and methane gas .
Geothermal energy ( metal buried underground heats up
Advantages of renewable energy
Renewable energy does not cause pollution
They will not run out
They are fairly safe to use
Disadvantages of renewable energy
They are expensive to develop and set up
More research needs to be done into how to make them good sources of energy
Non renewable energy
Non renewable energy sources cannot be replaced and will run out
Non renewable energy sources
Fosiil fuels oil , coal and gas
Fossil fuels
Oil , coal and natural gas are all examples of fossil fuels
Disadvantage of fossil fuel
They cause pollution and damage to the atmosphere
The sun as a source of all our energy
Heats the ocean and air creating wind, currents and allows plants to make føøð
Nuclear energy
When the nucleus of an atom split large amounts of energy are released from it
If this energy is uncontrolled dangerous explosions may happen
If the energy is controlled it can be used as a nuclear power station to make electricity
Advantages of nuclear energy
In medicine nuclear radiation is used to kill cancer cells ,sterilise fooð, produce electricity , it will not run out like fossil fuels
