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Flashcards in Energy Deck (25):
0

Energy

is the ability to do work

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Unit of energy

Joules

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Potential energy

Stored energy that is just waiting to do work such as a coiled spring or a elastic band

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Kinetic energy

The energy that moving things I.e, a windmill turning or a car moving

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Heat energy

Heat is energy because it can cause things to move

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Hot air

Hot air causes a hot air balloon to rise , heat ina steam engine moves trains !

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Light energy

Light can move in a crooked radiometer or ina solar powered calculator, plants use
Ought to make food

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Sound energy

If you put your head near a loud speaker you can feel that air is being moved by sound energy

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Electrical energy

This energy can make things like extractor fans move . It is the flow of electrons around a circuit

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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

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Nuclear energy

This energy is stored in the nucleus of atoms , the energy that comes from the sun

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Law of conservation of energy

Energy cannot be created or destroyed it can only be converted from one form to another

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Circuits

A circuit is made up of a battery , some wires and different types of equipment can be used to observe energy conversions

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Renewable energy

Energy sources that are constantly being replaced b nature

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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

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Advantages of renewable energy

Renewable energy does not cause pollution

They will not run out

They are fairly safe to use

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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

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Non renewable energy

Non renewable energy sources cannot be replaced and will run out

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Non renewable energy sources

Fosiil fuels oil , coal and gas

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Fossil fuels

Oil , coal and natural gas are all examples of fossil fuels

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Disadvantage of fossil fuel

They cause pollution and damage to the atmosphere

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The sun as a source of all our energy

Heats the ocean and air creating wind, currents and allows plants to make føøð

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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

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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

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Disadvantages of nuclear energy

Waste products are harmful , they also last for a very one time , if the nuclear energy gets out of control huge explosions may håppëñ