CONTENTS Energy Definition Characteristics Future Types of energy Chemical Electrical Thermal Electromagnetic Mechanical Nuclear Non-renewable energy sources Oil Coal Natural gas Uranium Energy sources Classification Renewable energy sources Biomass energy Hydroelectric energy Solar energy Eolic energy Geothermal energy Tidal energy
Resources Definition of energy Characteristics of energy Electrical energy Electromagnetic energy Chemical energy Nuclear energy Thermal energy Energy sources Coal Oil Natural gas Hydroelectric energy Uranium Solar energy Eolic energy Biomass energy Geothermal energy Tidal energy The future of energy Mechanical energy Links Energy resources
Definition of energy Unit of measurement: the joule (J). The ability of a system to do work. A physical quantity which produces a change or effect. ENERGY
Characteristics of energy Energy can be transported. Energy can be transformed. Energy can be transferred. Energy can be preserved. Energy can be degraded. Energy can be stored.
A battery stores chemical energy. Chemical energy Food is stored chemical energy. This is stored energy contained in chemical compounds. Chemical energy is released during chemical reactions.
Electrical energy Electric charge travels through wires in a circuit. This is energy produced by the flow of electric charge.
HEAT Thermal energy energy transfer movement of atoms and molecules This is energy which is released as heat. Energy transfer. When two objects at different temperatures are in contact, heat flows from the hotter to the colder object.
microwaves Electromagnetic energy light This is energy stored in electromagnetic waves or radiation. television waves radio waves
Mechanical energy <ul><li>This is the combination of two energies: </li></ul><ul><ul><li>kinetic energy </li></ul></ul><ul><ul><li>potential energy </li></ul></ul>SEE ANIMATION
Mechanical energy <ul><li>This is the combination of two energies: </li></ul><ul><ul><li>kinetic energy </li></ul></ul><ul><ul><li>potential energy </li></ul></ul>crane The blocks have potential energy. The falling block has kinetic energy but is losing its potential energy as it falls. The blocks have neither potential nor kinetic energy. GO BACK
Sun Nuclear energy The nucleus splits into two or more parts. Nuclear fusion Nuclear fission The nucleus joins to other nuclei. Nuclear power station Atomic explosion This is energy stored in the nuclei of atoms. energy energy
Energy sources Renewable and non-renewable energy sources used to produce electricity (2005) coal natural gas oil 8.9 % 19.9 % 28.2 % 16.6 % 26.2 % uranium Renewable energy sources 49.1 % 45.2 % 4 % hydroelectric energy eolic energy biomass energy 1% solar energy
Uses: electricity, fuel, heat chemicals, plastics, etc. crude oil Oil pipeline extraction A naturally ocurring thick, flammable liquid. refining process transport Remains of plants and animals
Coal Open pit mines Underground mines Uses: electricity, heat, steel An organic sedimentary rock formed from plant material. Anthracite coal produces the most heat.
gas pipeline Natural gas Uses: electricity, heat, fuel Regasification facility A gaseous fossil fuel, consisting mainly of methane. It is found in oil felds, natural gas fields and coal beds. transport liquification extraction
Uranium A natural occurring element found in rock, soil and water. cooling tower transformer generator condenser steam generator reactor core (uranium fuel) control rods turbine
Uses: heat, electricity and gases, such as ethanol Biomass energy This is energy obtained when organic matter is burned. Energy crops Organic waste Plant materials
Hydroelectric energy This is energy produced by the movement of water. maximum kinetic energy minimum potential energy Uses: heat, electricity minimum kinetic energy maximum potential energy transformer generator Hydroelectric power station lock gate turbine
Solar energy Lighthouse This is energy derived from sunlight. Homes Photovoltaic solar power facility Uses: heat, electricity Solar water heater hot water out cold water in
Eolic energy Wind turbine This is kinetic energy produced by the wind. Wind farm Uses: heat, electricity blades tower anemometer and wind vane shaft generator
Geothermal energy volcanic areas hot springs and geysers Uses: heating systems This is energy generated by the heat from within the Earth.
Tidal energy This is energy generated from ocean movement, mainly from tides. Energy is generated by the difference in height between high and low tide. SEE ANIMATION High tide Low tide
turbine generator low tide Lock gate opens. Water flows out of the reservoir. Lock gate closes. The reservoir is full of water. Water flows into the reservoir. Lock gate opens. Tidal energy This is energy generated from ocean movement, mainly from tides. TIDAL POWER STATION High tide Low tide Energy is generated by the difference in height between high and low tide. high tide GO BACK
The future of energy CLICK ON THE MAGNIFIERS FOR WAYS TO SAVE ENERGY.
The future of energy Turn off the lights when you leave a room. GO BACK
The future of energy Turn off electrical equipment and appliances. GO BACK
The future of energy Use efficient appliances. GO BACK
The future of energy Wash only full loads. GO BACK
The future of energy Use a pressure cooker and residual heat. GO BACK
The future of energy Use fluorescent lights. GO BACK
The future of energy Recycle paper and glass. GO BACK
The future of energy Use public transport. GO BACK
Links Kids saving energy http:// www.eere.energy.gov /kids/ Solar energy for kids http:// www.solarenergy.org/resources/youngkids.html Energy kids http://www.alliantenergykids.com/stellent2/groups/public/documents/pub/phk_001537.hcsp Interactive quizzes about energy http://library.thinkquest.org/05aug/00281/english/stopics/interactive/fossilquiz.htm How renewable energy works http://www.energysavingtrust.org.uk/generate_your_own_energy/how_renewable_energy_works Energy http:// www.iptv.org/exploremore/energy/profiles/profiles.cfm Energy story http:// www.energyquest.ca.gov/story/index.html Energy: fuelling the future http:// www.sciencemuseum.org.uk /energy/ Energy resources http:// www.eia.doe.gov/kids/energyfacts /