Unit 4 Global warming Reading

(共25张PPT)
energy sources
solar energy
oil
coal
biomass energy
nuclear energy
hydro-electric power
wind power
……
natural gas
wave / tidal energy
① What are they ② What are these buildings made of
③What’s the use
greenhouse / glass
A greenhouse is used for_____________, especially during ____ weather.
Turn to Pre-reading 1,
Page 25.
Read & answer.
growing plants
cold
_____ the heat from the sun
keeps it from _________
____ the air up
How does a greenhouse work
trap…from…: keep sth in a place
存住来自…的…
traps
escaping
heats
In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”.
methane
water vapor
carbon dioxide
carbon dioxide
Fossil Fuel(矿物燃料)
coal
oil
gas
global warming
● ● ● ● ● ●
produce
What do you think greenhouse gases do
Greenhouse gases _____ the heat of the sun and therefore ______ the earth.
It is known as __________________.
Nowadays our earth is becoming _____________________.
greenhouse effect
trap
warm
warmer and warmer
Fast Reading
Who wrote the magazine article The name of the magazine
What are the names of the three scientists mentioned in the article
What is mainly discussed in the passage
Skimming
★
★
1. Who wrote the magazine article The name of the magazine 2. What are the names of the three scientists mentioned in the article
Sophie Armstrong.
Earth Care.
Dr Janice Foster, Charles Keeling, George Hambley.
Reading tips: In English, some nouns begin with a capital letter(大写字母), such as names of people and places, titles(标题) of magazines, newspapers, stories and books, people’s titles(头衔), etc..
3.What is mainly discussed in the passage A. What has caused the global warming and whether it matters. B. What effects of the global warming will be. C. How serious the global warming could be. D. What the global warming is.
Skimming
Reading tips — skim the title and Para 1:
Title: THE EARTH IS BECOMING WARMER – BUT DOES IT MATTER
Para 1: … how has this come about and does it matter
★
★
★
difficult phrases
and sentences
1. There is no doubt that the earth is becoming warmer (see Graph 1) and that it is human activity that has caused this global warming rather than a random but natural phenomenon. Para 2
2. All scientists subscribe to the view that the increase in the earth’s temperature is due to the burning of fossil fuels… Para 3
3. They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide. Line 1, Para 5
1. What do Dr. Janice Foster and the scientist George Hambley think about the results of global warming
2. Do they agree with one another
Read Para 6 carefully and find the needed information.
Detailed Reading
Dr. Janice Foster thinks the effects of global warming could be very serious.
George Hambley thinks global warming will be mild with few bad environmental consequences.
They don't agree with each other.
Para 6
Does global warming matter
Positive effects
Negative effects
cause the sea level to rise
severe storms
floods
droughts
famines
the spread of diseases
disappearance of species
Positive effects
Negative effects
cause the sea level to rise
severe storms
floods
droughts
famines
the spread of diseases
disappearance of species
Positive effects
Negative effects
make plants grow quicker
crops will produce more
a greater range of animals
make life better
Idea-sharing
What will global warming bring to us in your opinion
I think … In my opinion… It will cause / make …
Assignment
Write a short passage about the effects of global warming.
Prepare the language points of this passage and underline the important ones.
After remembering the vocabulary, do the exercises on Page 28.