1. AQA Science © Nelson Thornes Ltd 2006  1

2. AQA Science © Nelson Thornes Ltd 2006  2

3. Population increase causes…..
Human activities
Population increase causes…..
K.W
Reradiate Acid rain
Combustion Sulphur Dioxide
Global warming Nitrogen monoxide
Methane
Rice paddy fields
Photodisc 4(NT)

4. Name Fuels Plant=coal Animal=oil Fuels
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5. Combustion When we burn fossil fuels we produce….
Petrol+Oxygen --- ? ?
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6. What else increase Carbon dioxide?
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7. Rising levels of carbon dioxide

8. The greenhouse effect
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9. Global warming Climate change
Most fuels contain
carbon
Carbon dioxide is released when fuels like gas, coal, oil, petrol and wood are burned.
Greenhouse gases cause the temperature of the Earth to rise slowly.
This causes climate change.
Methane released from cattle and rice fields is also a greenhouse gas.
Carbon dioxide
released when fuel
burned
Extra carbon dioxide
in the air slows down
heat loss from Earth
Climate change
AQA Science © Nelson Thornes Ltd 2006  9

10. Task-20mins to complete In sentences answer the following questions.
Draw an annotated diagram of global warming using page 125.(Ie Fig 1)
What are the effects of global warming?
AQA Science © Nelson Thornes Ltd 2006  10

11. Acid rain Sulphur dioxide Nitrogen dioxide And Monoxide
Digital Vision 15(NT)

12. Acid rain
Sulfur dioxide is released when fossil fuels like coal and oil are burned.
Acid rain damages rivers and lakes, making them more acid, so killing fish.
Acid rain damages trees.
Acid rain damages limestone buildings.
Nitrogen oxides released in car and jet fumes also cause acid rain.
Digital Vision (NT)
AQA Science © Nelson Thornes Ltd 2006  12

13. Formation of acid rain Sulfur impurities in coal and oil Sulfur
dioxide
released
when
burnt
Dissolves
in rain
and clouds
Falls as acid
rain, less than
pH5.5
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14. Formation of acid rain
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15. Task 10mins
What activities from Sulphur dioxide and Nitrogen oxide and Nitrogen dioxide?
How is acid rain formed?
Draw a quick diagram to describe how acid rain is formed (page 123 fig 3)
What are the effects of acid rain?
AQA Science © Nelson Thornes Ltd 2006  15

16. Preventing acid rain
International agreements to reduce sulfur dioxide pollution.
Energy efficiency means less coal burned to make electricity.
Ultra low sulfur petrol.
Alternative energy sources like natural gas, solar, wind farms and nuclear.
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17. The effect of international agreements
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18. Holes in the ozone layer
Get the gas right
Pollution problem
Gas
Global warming
Carbon dioxide
Acid rain
Sulfur dioxide
Holes in the ozone layer
CFCs
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19. The carbon cycle C entering C exiting Respiration Fossil formation
Dissolve in water
Combustion
Photosynthesis
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20. Preventing global warming
Energy efficiency means less fuel burned to make electricity.
Fuel cell buses.
Renewable energy sources like water power, solar, wind farms, bio fuels.
Nuclear power.
The Kyoto agreement to reduce CO2 emissions.
AQA Science © Nelson Thornes Ltd 2006  20

21. Supermarket plastic bags
Digital Vision 15(NT)
Each one takes 100 years to rot…..

22. Biodegradable plastic bags
…but not these ones
Paul Connell
This is not the only supermarket to use biodegradable bags.

23. Symphony plastics make a range of biodegradable plastic products.
Look out for their flash animation on:
See also
They have lots of pictures of their products and ‘environmental information’

24. Sustainable development
B1b 8.4
What is sustainable development?
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25. AQA Science © Nelson Thornes Ltd 2006  25

26. Sustainability is not about doing less – it is about doing more (but doing it with less). Sustainable development combines human progress and environmental stability. It means looking after the environment. Sustainable technologies could go on forever without damaging the environment for our grandchildren or our grandchildren’s grandchildren.
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27. Unsustainable technology
Uses resources that cannot be replaced
Produces wastes that cannot be broken down
Steals from the future to feed the present
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28. Sustainable technology
Uses resources that are replaced regularly
Produces wastes that break down harmlessly
Protects the future
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29. Sustainable? Or not? Air travel Motor cars Farming Fishing
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30. How could you make electricity generation more sustainable?
Click here to play video
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31. How could you make electricity generation more sustainable?
Click here to play video
Use renewable energy sources
Use non-polluting energy
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32. How could you make transport more sustainable?
Click here to play video
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33. How could you make transport more sustainable?
Click here to play video
Support more public transport systems
Encourage purchase of local resources and products
Use more energy-efficient vehicles
Build towns without need for cars
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34. How could you make housebuilding more sustainable?
Click here to play video
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35. How could you make housebuilding more sustainable?
Click here to play video
Use natural, low-energy materials in construction
Avoid waste-generating techniques
Make houses smaller and more energy efficient
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36. How could you make waste collection more sustainable?
Click here to play video
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37. How could you make waste collection more sustainable?
Click here to play video
Recycle more
Avoid landfill wherever possible
Reduce waste creation (e.g. excessive packaging)
Use waste for new products (e.g. making fleeces out of plastic
waste)
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38. Indicator species K.W Planning permission SSIS Lichens Sustainability
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39. Planning permission Field studies take place-
To predict the effect on the environment
Brown field site-Usually in towns/cities.They have already been
used. Often sites of old buildings,factories even rubbish tips!
Green field sites- Country side that has not been built on
We can use indicator species as indicators of pollution
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40. Sites of Scientific interest
Interesting/Unique landscape.
Home to rare species/Breeding grounds
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41. Lichens
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42. Water pollution Invertebrates are used. Blood worm
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43. Using the keywords Describe the green house effect.
Plenary
Using the keywords Describe the green house effect.
K.W
Combustion
Global warming
Methane
Rice paddy fields
Reflection
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