unit 4 global warming period 1. unit 4 study aims and demands topic: global warming; pollution;...

Unit 4 Global warming

Period 1

Unit 4

Study aims and demands

Topic: global warming; pollution; importance of protecting the earth

Words: compare, graph, phenomenon (pl. phenomena), fuel, quantity, per, data, catastrophe, climate, consequence, state, range, glance, widespread….

Function: agreement & disagreement; blame and complaint.

Grammar: the use of “it”

Unit 4

Energy resources

Do you know any kind of energy resource? Talk with your neighbors and write down as many as you can. Less than 1 min for you only.

Check your answers and think whether they are renewable or non-renewable.

Unit 4

Windmills, renewable.

What? Renewable?

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What? What kind? Renewable?

A coal power station , non-renewable.

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What? What kind? Renewable?

An oil refinery(精炼厂 ), non-renewable.

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What? What kind? Renewable?

A nuclear power plant, non-renewable.

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What? What kind? Renewable?

Solar panels, renewable.

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What? What kind? Renewable?

A hydro-electric dam, renewable.

Unit 4

Guess it!

Uranium Ore (铀矿石 ) The element uranium does not occur in pure fo

rm in nature but is found in minerals such as carnotite（钒钾铀矿） , pictured here.

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What source of energy?

Geysers(间歇泉 )

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Geothermal (地热的 ) Energy Plant

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Thermal(温泉的 ) Region, Iceland

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Non-renewable Renewable

Coal Oil Natural gas Uranium

Wind (wind power) Sun (solar energy) Water (hydro-electric

power) Plant waste (biomass

energy) Hot springs or geysers

(geothermal energy) The sea (tidal energy)

Fossil fuels

Unit 4

What are fossil fuels?

Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed.

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What about the weather?

9 / 14℃ ℃

We need…

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The sun.

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How about the plants?

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If lack of solar energy, the plants…

Greenhouse

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Greenhouse gases! What are greenhouse gases?

What’s greenhouse effect?

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Unit 4

Unit 4

Read the passage quickly…

Who wrote? What’s the name of the magazine?

What are the names of the three scientists mentioned?

Is the global warming terrible? What are the two graphs about? What’s the main topic of the article?

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Who wrote? What’s the name of the magazine?

Sophie Armstrong. “Earth Care”. What are the names of the three scientists

mentioned? Dr Janice Foster, Charles Keeling, George

Hambley.

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Is the global warming terrible? Different. What are the two graphs about? The first graph shows the temperature of

one degree Fahrenheit between 1860-2000.The Second graph shows the carbon dioxide content in the atmosphere from 1957-1997.

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What’s the main topic of the article? Global warming/ the warming of the earth.

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True or false!

The temperature last century didn't increase much.

Everyone believes that global warming is caused by the activities of humans.

Janice Foster believes that global warming is caused by burning fossil fuels.

Natural gas is a greenhouse gas. Carbon dioxide is a byproduct of burning

fossil fuels.

×

×

×

√

√

Unit 4

People accept Charles Keeling's data because he took accurate measurements.

Flooding could be one of the effects of future global warming.

George Hambley believes scientists are just guessing about the effects of global warming.

√

√

√

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George Hambley is worried about the effects of carbon dioxide on plant growth.

It is clear what the effects of global warming will be. ×

×

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Read for the details.

What’s the main idea of the passage? The __________ have different ideas on whether it __________ when the earth is becoming __________.

scientistsmatterswarmer

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Parts. Part 1( Para 1): There is a fierce debate over what has

caused this global warming. Part 2 (Para 2-7) Some scientists think that global warming

could be serious. Part 3 (Para 8) Some think that we should not worry much

about global warming.

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Parts.

Part 4 (Para 9): No one knows what the effects of global

warming will be.

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Yes or no?

Does Sophie Armstrong support a clear opinion?

No. he doesn’t state it clearly. Does George Hambley believe that we shou

ld worry much about the global warming? No, he doesn’t.

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Choices.

1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A. Dr. Janice Foster. B. Charles Keeling.C. George Hambley. D. Sophie Armstrong. B

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2. "But there are some very different attitudes among scientists towards this issue.“ "Issue" here means the same as the one in________.A. I bought the new stamp the day of its issue. B. They are talking about one of the key issues in the election campaign.C. The government is expected to issue a statement about the election.D. The magazine has 12 issues each year.

B

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3. The author probably agrees that ________A. actually global warming is good for man.B. we should do nothing about the global warming.C. catastrophes will happen if the globe keeps on warming.D. a lot remains to be found out about the effects of global warming.

D

Unit 4

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 __________ and will en- courage ____________________.

go up

catastrophe

Very serious

positive

produce

a greater range of animals

Unit 4

Homework assignment

Prepare the language points of this passage and underline the important ones.

After remembering the vocabulary, do the exercise on Page 28.