1. GLOBAL WARMING

2. Understand global warming and how it can be reduced / prevented
Learning Objectives:
In order to be successful in this lesson you must be able to:
Understand global warming and how it can be reduced / prevented
Identify and explain the strengths and weaknesses in evidence about global warming and the implications of these
State what the greenhouse effect is and which gases contribute to this
Describe the consequences of global warming and how greenhouse gas emissions can be reduced
Success…

3. The greenhouse effect
The atmosphere is a thin layer of gases that surrounds the Earth.
Certain gases in the atmosphere trap some of the heat given off from Earth. This trapped heat is reflected back to
the surface and warms the Earth.
The glass in a greenhouse also traps heat inside and so the trapping of heat by the Earth’s atmosphere is called
the greenhouse effect.
Without the atmosphere and the greenhouse effect, Earth would be
too cold for life to exist!

4. The greenhouse effect

5. Global warming
Carbon dioxide is the main greenhouse gas involved the warming of the Earth by the greenhouse effect.
Human activity is producing more carbon dioxide and other greenhouse gases.
An increase in the amount of greenhouse gases could increase the amount of heat trapped in the atmosphere.
Some scientists think that this increased greenhouse effect is making the Earth warmer and leading to global warming.
What human activities might contribute to global warming?

6. Effects of global warming
If global warming rises as some scientists predict, it could cause major climate changes:
temperature – some areas may be warmer, others colder;
coastal flooding – sea levels could rise as ocean’s get warmer;
rainfall – some areas may be wetter and others drier;
plants – some crops may be able to grow better and others not at all.
Not all scientists agree about global warming. What evidence is needed to support the theory about global warming?

7. Global Warming
You will use the internet and other suitable resources to find out more information about the greenhouse effect & global warming. To make it easy to understand, stick to diagrams & photos.
You will use this information to produce a PowerPoint presentation, to to claim up to 2 positive points!!
Slide 1
Title page with suitable images
What is global warming?
What are the greenhouse gases?
Slide 2
What are the causes of global warming?
What are the effects / consequences of global warming?
Slide 3
Ways that global warming can be reduced
Opinions about global warming expressed by different scientists
Slide 4
Give your own conclusion / opinions on global warming