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(共17张PPT)
高一英语第2课时
教学材料：外研版高中英语必修第三册
教学内容：Module 4 Sandstorms in Asia
Reading Sandstorms in Asia
massive
dust
intense
thick
overgrazing
overgraze v.
英 / v ɡre z/ 美 / o v r ɡre z/
vi. 过度放牧
vt. 在…上过度放牧
massive adj.
英 / m s v/ 美 / m s v/
adj. 大规模的，巨大的，厚重的
intense adj.
英 / n tens/ 美 / n tens/
adj. 强烈的
intense extreme weather
强烈的极端天气
Sandstorms in Asia
Match the words with the definitions.
to ride a bicycle
someone who knows a lot about a particular subject
things that happen one after another, and have a result
some one who lives in a particular town or country
very small bits of dirt or earth, on the ground or in the air
to continue to live after a difficult or dangerous situation or event
to say what will probably happen
8. everything that is happening at a particular time.
citizen cycle (v) dust expert forecast process situation survive
cycle (v)
2. expert
3. process
4. citizen
5. dust
6. survive
7. forecast
8. situation
Sandstorms in Asia
1
2
3
4
5
6
Paragraph 1
problem：
sandstorm
a major disaster
Task 1
Can you summarize paragraph 2 to 6 with only ONE word
mass adj. -->人
massive adj. -->物
Sandstorms in Asia
1
2
3
4
5
6
Paragraph 1
problem：
sandstorm
a major disaster
Task 1
Can you summarize paragraph 2 to 6 with only ONE word
Para. 2 Description
Para. 3 Cause/ Reasons
Para. 4 Influence/ Effect
Para. 5 Suggestion
Para. 6 Measures
measure n.
英 / me (r)/ 美 / me r/
n. 措施，方法
Sandstorms in Asia
Sandstorms are strong, dry winds that carry sand. They are often so thick that you cannot see the sun, and the wind is sometimes strong enough to move sand dunes. The four main places in the world where there are sandstorms are Central Asia, North America, Central Africa and Australia. Ren Jianbo, from Inner Mongolia described a terrible sandstorm he experienced as a child in the desert. “To have been caught in a sandstorm was a terrible experience,” he said. “There was nothing to be done. It was the most frightening and the most dangerous situation I’ve ever been in. You just had to hope you'd survive. I thought I was going to disappear under the sand.”
Sandstorms are strong, dry winds that carry sand. They are often so thick that you cannot see the sun, and the wind is sometimes strong enough to move sand dunes. The four main places in the world where there are sandstorms are Central Asia, North America, Central Africa and Australia. Ren Jianbo, from Inner Mongolia described a terrible sandstorm he experienced as a child in the desert. “To have been caught in a sandstorm was a terrible experience,” he said. “There was nothing to be done. It was the most frightening and the most dangerous situation I’ve ever been in. You just had to hope you'd survive. I thought I was going to disappear under the sand.”
2
Para. 2 Description
terrible
英 / ter bl/ 美 / ter bl/
adj. 非常讨厌的；令人极不快的；可怕的
be caught in
被困在，陷入，遇到
intense extreme weather
强烈的极端天气
Sandstorms in Asia
Northwest China is part of the sandstorm centre in Central Asia. Sandstorms begin in desert areas. Sandstorms in China appear to have increased in recent years as a result of “desertification”. This is a process that happens when land becomes desert because of climate changes and because people cut down trees and dig up grass.
Sandstorms sometimes affect Beijing. Citizens wake up to an orange sky and strong winds that cover the city in a thick, brown-yellow dust. The storms sometimes continue all day and traffic moves very slowly because the thick dust makes it difficult to see.
3
4
Para. 3 Cause/Reasons
Para. 4 Influence/Effect
vt. 影响，侵袭，感染
vt. 覆盖；遮盖；包含
Sandstorms in Asia
The Chinese Central Weather Station can forecast a sandstorm some weeks before it arrives in Beijing, but the strength of the storm sometimes surprises people. When a sandstorm arrives in the city, weather experts advise people not to go out. Huang Xiaomei, who lives in Beijing says, “To be cycling in a sandstorm is frightening. The winds are very strong. It's difficult to breathe and the dust makes me ill. So if you want to go out, you'd better wear a mask.”
5
Para. 5 Suggestion
advise you to stay inside
goggles
a moistened scarf
breathe
英 /bri / 美 /bri /
vt./vi. 呼吸
moistened
美 /'m snd/
adj. 弄湿的
goggles
英 / ɡ ɡlz/ 美 / ɡɑ ɡlz/
[ pl. ] n. 护目镜
？
How do camels protect themselves
from sandstorms
Camels are well built to protect themselves from sand storms. They have very wide, flat feet that expand as they put weight on them. This wide, flat foot protects them from slipping on the sand as they walk or run. Camels also have the ability to tightly close their nostrils鼻孔 and this would prevent them from inhaling吸入 sand during a sand storm. In addition, camels also have two or three layers层 of very thick eye lashes睫毛 to help keep the sand from getting into their eyes. They also have very thick, coarse粗糙的 hair that outlines the inner parts of their ears so that sand is not able to get inside their ears. Camels also have very strong lips嘴唇 that they can press压 together to avoid getting sand in their mouth. So, camels are well equipped to handle a sand storm. There is no way blowing sand can get inside their noses, their eyes, their ears or their mouths.
Camels are well built to protect themselves from sand storms. They have very wide, flat feet that expand as they put weight on them. This wide, flat foot protects them from slipping on the sand as they walk or run. Camels also have the ability to tightly close their nostrils鼻孔 and this would prevent them from inhaling吸入 sand during a sand storm. In addition, camels also have two or three layers层 of very thick eye lashes睫毛 to help keep the sand from getting into their eyes. They also have very thick, coarse粗糙的 hair that outlines the inner parts of their ears so that sand is not able to get inside their ears. Camels also have very strong lips嘴唇 that they can press压 together to avoid getting sand in their mouth. So, camels are well equipped to handle a sand storm. There is no way blowing sand can get inside their noses, their eyes, their ears or their mouths.
How do sandstorms affect your life
airlines cancelled
difficult driving conditions
schools may call a day off
might stop work
cause breathing-related problems
contribute to heart attacks
Sandstorms can effect people’s lives in many different ways. Sandstorms can get inside your vents通风孔 and any other openings in your house if you do not block堵住 them off correctly. It can cause severe damage to your furniture and other things in your house including you.
The Dust Bowl
Sandstorms in Asia
The desert is only 250 kilometres away to the west of Beijing. To prevent it coming nearer, the government is planting trees. Already the government has planted more than 30 billion trees and plans to continue planting for the next five years.
6
Para. 6 Measures
measure n.
英 / me (r)/ 美 / me r/
n. 措施，方法
Sandstorms in Asia
Summary
sandstorms
a major disaster
What
Why
Influence
Advice
Measures
Why
Now we know...
Be aware!
Call on to protect the environment!
Homework
Design your own post to arouse people's awareness to protect the environment
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教学内容：Grammar
预习内容：P34

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