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Bell WorkTitle: Climate Change Date:
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Lesson Sequence
Specification – GCSE AQA ChemistryTeaching from Sept 2016 onwards
Spec Reference 5.9.2.3
Topic Chemistry of theatmosphere
Lesson Climate change
Sequence 8 of 10
Key Words;Climate change
Lesson
1 The atmosphere
2 Testing gases
3 Forming today's atmosphere
4 Combustion
5 The harmful effects of combustion
6 Greenhouse gases
7 Human impact on the greenhouse effect
8 Climate change
9 Reducing the carbon footprint
10 Test
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Lesson Competency (Level 1-3)
Proficiency (Level 4-6)
Mastery (Level 7-9)
8Can state what is meant by climate
change and state one effect
Can discuss economic and social effects of climate
changeX
Lesson Objectives
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What's happening here ?
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What is climate Change?
Climate Change refers to changes in the world’s atmosphere.
It includes a rise in average global temperature and changes in rainfall and other
weather patterns.
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At the heart of Climate Change is the GREENHOUSE EFFECT.
What is the greenhouse effect?
The Greenhouse Effect
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What happens to a car when it is left in direct sunlight?
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1. Greenhouses trap heat from the sun.
2. The glass panels let in light but keep heat from escaping.
3. This causes the greenhouse to heat up.
Greenhouse Effect
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Without greenhouse gases, heat would escape
back into space and Earth’s average
temperature would be about 16ºC
colder...
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How might climate change affect these animals?
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So what’s the problem?
The increasing amounts of greenhouse gases released is trapping too much heat making the planet warmer than it
should be. This results in Global Warming.
Greenhouse Effect
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Global warming
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Greenhouse gasesThere are six greenhouse gases and it isthought that carbon dioxide (CO2) is one of
the most important greenhouse gas.
Water vapour(H20)
Methane(CH4)
Ozone(O3)
Nitrogen dioxide(NO2)
Carbon dioxide(C02)
Sulphur dioxide(S02)
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Information race
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Scientists worry that climate change is progressing so rapidly that, within
decades, humans may be helpless to slow or reverse the trend.
There is a threshold where a slight rise in the Earth's temperature can cause a
dramatic change in the environment that itself triggers a far greater increase in
global temperatures.
This is the ‘tipping point’ beyond which really dangerous climate change is likely
to be unstoppable.
What is happening in the Arctic is a "tipping point”
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Some key words are:- Locked, Miller-Urey, evaporation
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Sea levels around the world could rise.Cities on coasts would flooding.
What if the Earth heats up?
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Temperate places that now receive frequentrain and snowfall might become hotter anddrier, leading to more drought.
What if the Earth heats up?
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Frequent periods of drought would makeit hard to raise crops for food, leading tofamine.
What if the Earth heats up?
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Forest fires could occur more often.
What if the Earth heats up?
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Plants and animals unable to take the heatmay go extinct, and be replaced by heattolerant species.
What if the Earth heats up?
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Hurricanes, tornadoes and other stormscaused by changes in heat and waterevaporation might occur more frequentlyand be more intense.
What if the Earth heats up?
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In the UK, we expect that because of climate change:
• Temperatures will increase. • Winter rainfall will get heavier, increasingthe risk of flooding.
The effects of Climate Change
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• Summer rainfall in the UK may reduce considerably,creating pressure on water resources.
• Sea levels will rise due to melting ice caps, leadingto further coastal erosion and flood risk.
The effects of Climate Change
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