牛津译林版（2019）必修第三册Unit 2 Natural disasters Welcome to the unit 课件（21张PPT）

(共21张PPT)
B3U2 Natural disasters
Welcome to the unit
Teaching Objectives:
get the basic information of three types of natural disasters after watching the video;
talk about different types of natural disasters;
share with peers the information of the natural disasters in history.
After this section, students should be able to:
Part 1 Lead-in
What natural disasters in history have you heard about
tornado
typhoon
[t ne d ]龙卷风
volcano[v l ke n ]
drought [dra t]
flood
landslide [ l ndsla d]
tsunami [tsu nɑ mi]
earthquake[ θkwe k]
Famous saying: P15
Nature is kind of a loving mother, but also a butcher in cold blood.
—Victor Hugo
大自然是慈爱的母亲，也是冷血的屠夫。
——维克多·雨果
维克多·雨果：法国作家；代表作《巴黎圣母院》
Part 2
Three natural disasters
Presentation
What kind of types of natural disasters are mentioned in this video
Earthquake
plate n.板块
surface n.表面
volcano
erupt v.爆发
ash n.灰
escape v.逃离
landslide
fall down 倒塌
hill n.山丘
Try to use your words to explain why or how it happened
Practice
Listen to the video again and check your answer.
Plates moving underground can cause an earthquake, which is _______________ of the earth’s surface.
When a volcano erupts, ___________, volcanic ash and even rocks escape through a large opening at the top.
A large amount of _______________ falling down a hill or mountain is called a landslide.
a sudden shaking
hot gases
earth and rock
Part 3
Further exploration
A natural disaster is a _________ natural event that causes great damage and suffering . It can happen ____________ , at any time . Let ' s look at some examples .
An earthquake is a sudden shaking of the earth ' s surface , caused by the
___________ of plates underground . Earthquakes are most common _________ plates meet . Several million small earthquakes happen every year , but most do not cause any damage . Serious earthquakes , however , can destroy entire cities . When a ___________ earthquake hit San Francisco in 1906, about 3,000 people died and over 80 per cent of the city was destroyed .
A volcanic eruption occurs _______ hot gases , volcanic ash and even rocks escape through a large opening at the top of a volcano . The gases and ash can cause acid rain and even storms . The hot liquid rock moving down the volcano ________ everything and anything in its way . The ____________ of Mount St Helens in 1980 was the worst volcanic disaster in the history of the United States . It killed 57 people and about 7,000 large animals .
A landslide happens when a large amount of earth and rock falls down a hill or mountain . Landslides are often caused by heavy _________ , earthquakes , volcanic eruptions or other natural disasters . Sometimes they are also caused by human activities such as cutting down forests .
Serious landslides can cause whole mountainsides to _______ away . Villages or towns located in the path of such landslides can be ____________ destroyed . In 2014, a landslide in India killed at least 150 people .
sudden
anywhere
movement
where
terrible
burns
when
eruption
rainfall
roll
completely
Listen again and try to fill in the blanks according to what you heard.
Discuss the following questions:
1、How many small earthquakes happen every year
2、What can the volcanic gas and ash cause
3、What are landslides often caused by
Sevaral million small earthquakes happen every year.
They can cause acid rain and even storms.
Heavy rainfall, earthquakes, volcanic eruptions or other natural disasters.
Sometimes human activities such as cutting down forests can also cause landsides.
Task 1
Production
What natural disaster in history have you heard about How are these place now
An 8.0 magnitude earthquake hit Sichuan on 2008, May ,12th.
380 killed or disappeared in heavy rain in China’s Zhengzhou in 2021.
Forest fire killing 30 put out in southwest China’s Sichuan in 2019
We Chinese work hand in hand to rebuild our planet!
Task 2
THANKS