EnergyEnergy

What are What are the six the six main main forms of forms of energy?energy?

What are fuels?What are fuels?Fuel is a substance Fuel is a substance which can be used as a which can be used as a source of energy.source of energy.

Fuels store chemical Fuels store chemical energy.energy.

When we burn a fuel, its When we burn a fuel, its chemical energy is chemical energy is released.released.

Food is the fuel for our Food is the fuel for our bodies bodies

CanCan you give me examples of you give me examples of fuel?fuel?

Food, Food,

wood, wood,

petrol, petrol,

diesel, diesel,

wax, etc.wax, etc.

WhatWhat is fossil fuel?is fossil fuel?Can you give me some Can you give me some examples of fossil fuel? examples of fossil fuel?

Most of our common fuels are Most of our common fuels are fossil fuel. fossil fuel.

Coal, crude oil (which gives Coal, crude oil (which gives us petrol), and natural gas us petrol), and natural gas are all fossil fuel. are all fossil fuel.

Fossil fuelFossil fuel

Where does fossil fuel come from?Where does fossil fuel come from?

Fossil fuels have taken millions Fossil fuels have taken millions of years to form. Crude oil was of years to form. Crude oil was formed from tiny animals and formed from tiny animals and plants which lived in the sea. plants which lived in the sea.

Fossil FuelFossil FuelAnimals were buried Animals were buried under layers of sand and under layers of sand and silt on the sea bed. As silt on the sea bed. As the pressure and the pressure and temperature slowly temperature slowly increased, they were increased, they were changed into oil. Nature changed into oil. Nature gas can also be found gas can also be found with the crude oil.with the crude oil.

Fossil FuelFossil Fuel

CoalCoal

OilOil

Power Station Power Station

Renewable and Non-renewable Renewable and Non-renewable source of energysource of energy

Is fossil fuel a renewable or a Is fossil fuel a renewable or a non-renewable source of energy?non-renewable source of energy?

What does renewable and non-What does renewable and non-renewable source of energy renewable source of energy mean?mean?

Non-renewable source of energyNon-renewable source of energy

Fossil fuels are non-renewable Fossil fuels are non-renewable sources of energy. sources of energy.

Once we have used them up, they Once we have used them up, they are gone forever. are gone forever. Fossil fuels are Fossil fuels are not being replaced at the same rate not being replaced at the same rate as they are being used up. as they are being used up.

We need to consider alternative We need to consider alternative renewable sources of energy for the renewable sources of energy for the future. future.

Nuclear powerNuclear power

This is also a nonrenewable source This is also a nonrenewable source of energy since once the energy goes of energy since once the energy goes out of the atom, it cannot be used out of the atom, it cannot be used again. Its clean but costly and again. Its clean but costly and dangerous to store the waste dangerous to store the waste products.products.

Renewable source of energyRenewable source of energy

Can you give me some Can you give me some examples of renewable source examples of renewable source of energy? of energy?

Wind, solar, wave, tidal, Wind, solar, wave, tidal, hydroelectric ,Biomass, and hydroelectric ,Biomass, and geothermal.geothermal.

Wind powerWind power

Uses the force of the Uses the force of the wind to turn wind to turn generators to produce generators to produce electricity.electricity.

Disadvantages: they Disadvantages: they require vast amounts require vast amounts of land and they of land and they produce a lot of noise.produce a lot of noise.

Wind PowerWind Power

Renewable Renewable energyenergyThese are wind These are wind

generators these generators these produce energy produce energy from wind from wind

Solar energySolar energy

Use the energy of the sun either by Use the energy of the sun either by using black-painted collector plates using black-painted collector plates by which to heat water and homes or by which to heat water and homes or by using photovoltaic cells or by using photovoltaic cells or photocells to generate electricity.photocells to generate electricity.

Disadvantage include the initial cost Disadvantage include the initial cost of cells as well as the fact that the of cells as well as the fact that the sun does not shine all the time. sun does not shine all the time.

Solar panelsSolar panels

Solar EnergySolar Energy

Hydroelectric powerHydroelectric powerHydroelectric power (HEP) is Hydroelectric power (HEP) is electricity generated from the energy electricity generated from the energy of falling water. It is a very cheap of falling water. It is a very cheap source of electricity at mountainous source of electricity at mountainous areas.areas.

Disadvantage: they often require Disadvantage: they often require valleys to be flooded and valleys to be flooded and communities to be moved. communities to be moved.

How it worksHow it works

HydroelectricHydroelectric

Renewable Renewable energyenergyThisThis is hydroelectric is hydroelectric

energy it doesn't energy it doesn't make pollution make pollution

Wave powerWave power

Wave powerWave powerEnergy of moving waves is used Energy of moving waves is used to generate electricity.to generate electricity.

The vertical motion of waves is The vertical motion of waves is converted to rotary motion which converted to rotary motion which is used to drive a generator is used to drive a generator producing electricity. producing electricity.

Disadvantage is that a vast Disadvantage is that a vast numbers of strings of these ducks numbers of strings of these ducks would be required.would be required.

Biomass and biogasBiomass and biogas

WoodWood

EthanolEthanol

MethaneMethane

Biodegradable wastesBiodegradable wastes

TidalTidal

GeothermalGeothermal

Our earth’s interior provides heat Our earth’s interior provides heat which can be used without polluting which can be used without polluting the air.the air.

MeasurmentMeasurment

Energy is measured in Joules (J)Energy is measured in Joules (J)

1000 (J) = 1 kilojoule (kJ)1000 (J) = 1 kilojoule (kJ)

James Prescott Joule 1818-1889James Prescott Joule 1818-1889

Did you know ?Did you know ?

What do these things have in What do these things have in common: ink , crayons , bubble common: ink , crayons , bubble gum , dishwashing liquid , deodorant, gum , dishwashing liquid , deodorant, eyeglasses , tires and heart valves ? eyeglasses , tires and heart valves ? They’re all among the 3,000 They’re all among the 3,000 synthetic products made from fossil synthetic products made from fossil fuels. fuels.

Did you know ?Did you know ?

When natural gas is burned, it When natural gas is burned, it produces mostly carbon dioxide and produces mostly carbon dioxide and water vapor. These are the same water vapor. These are the same substances emitted when people substances emitted when people breathe. breathe.

Did you know ?Did you know ?

             If all the passenger vehicles in the United States were lined up

bumper to bumper, they would reach from the earth to the moon and back! The amount of fuel consumed in these vehicles each year is enough to fill a swimming pool as big as a football field that is 40 miles deep!

Did you know ?Did you know ?

Did you know that the gasoline in your Did you know that the gasoline in your car's tank is made from petroleum formed car's tank is made from petroleum formed from plants and tiny animals that lived from plants and tiny animals that lived 100's of millions of years ago, way BEFORE 100's of millions of years ago, way BEFORE dinosaursdinosaurs..