unit 2 Global warming

(共14张PPT)
The earth is becoming
warming-But does it matter
Learning Aim:
Know well the global warming
Emotion Aim:
Save energy and protect environment
What is a greenhouse
used for
How does it work
Who wrote the magazine article
What is the name of the magazine
Sophie Armstrong
Earth Care
Scan the passage and answer the following questions:
Dr. Janice Foster
2. What are the names of the three
scientists mentioned in the article
Charles Keeling
George Hambley
3.The different ideas between Dr. Janice Foster & George Hambley
Dr. Janice Foster George Hambley
Carbon dioxide has caused the global temperature to __________. An increase of five degrees would be a ____________ and could be ______________. More carbon dioxide is a __________ thing,
which makes crops __________ more and will en- courage ___________________________.
go up
catastrophe
very serious
positive
produce
a greater range of animals
4. What are the two graphs about
The first graph shows:
The second graph shows:
the temperature increase of one
degree Fahrenheit between 1860
to 2000.
the carbon dioxide content in the atmosphere from 1957 to 1997.
5. What is global warming
The earth is becoming warmer.
6. How has global warming come about
Human activity
burnig of fossil fuels
Greenhouse effect
greenhouse gases
we need those gases
from around 315 parts per million to around 370 parts per million
Huge quantities of extra carbon dioxide
From 1957 to 1997
7. What are the effects of global
warming
The sea level to rise
Severestorms,droughts ,famines, the spread of diseases, and the
destruction of species
Make plants grow faster.
The main idea of the passage:
Part 1(Paragraphs 1)
Part 2(Paragraphs 2-4)
Part 3(Paragraphs5-10)
Introduce a debate over the issue of global warming
Illustrate how global warming comes about
List two different attitudes among scientists towards global warming
Part 4(Paragraphs 11)
It’s up to readers to think and decide whether people should do something about global warming or not
Finish Ex.2 ( decide whether the statements true or false after reading the article carefully)
What can we do to control the greenhouse effect
Let us save energy
and protect
environment together.