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Energies & electricity

Unit 3.Lesson 1

Energies

Primary energy

• Energy comes from a

natural source. They are

originated by the Sun, the

Earth or the Moon.

• Renewable energies come

from sources that never run

out.

• Non-renewable energies

come from sources that

could run out.

Secondary energy

• Energy comes from the

transformation of a

primary energy.

• They are a more convenient

for transport and use

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NonNon--renewable energiesrenewable energies

1) Nuclear energy: Earth storage

Coal

2) Fossil energy: Solar storage

Natural Gas Crude Oil

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Renewable energies 1Renewable energies 11) Direct Solar energy

Thermal use

Photovoltaic use

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Renewable energies 2Renewable energies 2

2) Other Solar related energies

Wind power

Water power

Bio energy

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Renewable energies 3Renewable energies 3

4) Solar and Moon energy

3) Earth energy

Geothermal power

Tide and waves power

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ElectricityElectricity2) As a Secondary energy1) As a Primary energy

Lightning Transport

Use

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Electricity pathElectricity path

Primary Energy sources

Secondary energy conversion

Electricity appliances

Electricity transport

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Domestic Electricity circuitDomestic Electricity circuit

Generation

Transport

Receptors

Switches

Mains: plugs &sockets

Chemical batteries

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