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© Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 1 of 24 KS3 Physics 7I Energy Resources.

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Presentation on theme: "© Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 1 of 24 KS3 Physics 7I Energy Resources."— Presentation transcript:

1 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 1 of 24 KS3 Physics 7I Energy Resources

2 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 2 of 24 7I Energy Resources Contents The nature of energy Energy resources Fossil fuels Summary activities

3 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 3 of 24 Can you think of examples of each type of energy? There are many different types of energy: thermal light sound elastic gravitational kinetic electrical chemical nuclear Different types of energy

4 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 4 of 24 Which type of energy?

5 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 5 of 24 Energy can be changed from one form to another. For example: Chemical energy in food is converted to thermal energy and kinetic energy by our bodies. Energy transfer What other energy transfers can you think of? Gravitational energy in a ball is converted to kinetic energy when it falls to the ground.

6 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 6 of 24 burning match portable torch microphone radio television catapult mobile phone car chemical to heat and light sound to electrical electrical to sound and heat electrical to sound and light and heat elastic to kinetic and heat chemical to sound and microwaves (EM radiation) and heat chemical to kinetic and sound and heat In all these transfers the energy is not lost, it is conserved. Energy cannot be destroyed or created. What energy transfer takes place in each device? What is the energy transfer?

7 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 7 of 24 7I Energy Resources Contents The nature of energy Energy resources Fossil fuels Summary activities

8 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 8 of 24 Humans use chemical energy (from food) to live and function. However, in a modern society we also use large amounts of energy from other sources. Can you think of some activities requiring energy? Where does the energy for these type of activities come from? travelling and communicating over long distances; controlling our environment, e.g. air conditioning/heating; manufacturing and building many kinds of materials and products, e.g. roads, cars, buildings, prepared food. Using energy

9 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 9 of 24 Energy resources can be divided into two types: renewable (e.g. hydroelectric); non-renewable (e.g. coal, oil, nuclear and natural gas). Energy resources in the UK

10 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 10 of 24 There is a finite amount of fossil fuels on the Earth and they will eventually run out. Once fossil fuels are used they cannot be regenerated and used again, so they are called non-renewable. Non-renewable energy resources oilcoal natural gas Oil, coal and natural gas are examples of fossil fuels. They were formed from biological deposits over the course of millions of years.

11 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 11 of 24 Renewable energy resources will not run out because they can easily be regenerated. Only 2% of the UK’s energy comes from renewable sources. Can you think of a reason why? Renewable energy sources Examples of renewable energy resources are: wind power solar power tidal power biomass

12 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 12 of 24 Renewable or non-renewable?

13 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 13 of 24 The Sun The Sun is the original source of most energy resources. Plants store the Sun’s energy through photosynthesis. Animals then eat the plants. Energy and the Sun

14 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 14 of 24 coal wind biomass oil The Sun is the original source of most energy resources. natural gas food Energy resources from the Sun waves

15 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 15 of 24 7I Energy Resources Contents The nature of energy Energy resources Fossil fuels Summary activities

16 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 16 of 24 Fossil fuels

17 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 17 of 24 About 300 million years ago, trees and other plants photosynthesized and stored the Sun’s energy. Dead plants fell into swampy water and the mud prevented them from rotting away. How coal was formed Over the years, the mud piled up and squashed the plant remains. After millions of years under this pressure, the mud became rock and the dead plants became coal.

18 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 18 of 24 Coal formation

19 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 19 of 24 Oil and gas are also biological in origin. Millions of years ago tiny animals lived in the sea. Like today, their ecosystem was dependent on heat and light from the Sun and photosynthesis by plants. When they died they fell into mud and sand at the bottom of the sea but did not rot away. Over millions of years, they got buried deeper by the mud and sand. The temperature and pressure (caused by the weight of the sediments and deep burial) changed the mud and sand into rock and the dead animals into crude oil and natural gas. This sample of crude oil was formed in southern England. Crude oil formed in other parts of the world can be very different in appearance and viscosity. How oil and gas were formed

20 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 20 of 24 Oil and gas formation

21 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 21 of 24 7I Energy Resources Contents The nature of energy Energy resources Fossil fuels Summary activities

22 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 22 of 24 Glossary energy – The ability to do work – it exists in different forms such as chemical, electrical, heat and light. energy transfer – Changing energy from one form to another. energy resource – A substance that is a source of energy. fuel – A substance that releases energy when it burns. fossil fuel – A fuel that is formed from the remains of dead plants and animals, such as coal, oil and natural gas. non-renewable – An energy resource that cannot be replaced and will eventually run out. renewable – An energy resource that can be replaced and will not run out.

23 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 23 of 24 Anagrams

24 © Boardworks Ltd 2004 1 of 20 © Boardworks Ltd 2005 24 of 24 Multiple-choice quiz


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