新视野大学英语第二版第三册第六单元课件

personally prepared ____________________.
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Text Study—Understanding
II. Understanding
Para. 1
1. How can we know about warning signs of earthquakes?
Tips
Hold on
If you are in the car If you can’t run out of the house in time
Stop
During the earthquake
Calm
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Ways on self-rescue
drop onto the ground
keep away from the power lines
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What’s earthquake
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An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves（地震波）. Sometimes an earthquake has foreshocks. There are smaller earthquakes that happen in the same place as the larger earthquake that follows.
I. Structure Analysis
A. The way to develop the text:
General Statements + Details + Conclusion The text tells mainly about how to prepare for an earthquake, namely, the prediction, prevention and preparation of earthquakes.
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Text Study—Structure Analysis
Paragraphs
1 2
Ways of Development
General Statement 1 + Details General Statement 2 + Details
3-6 General Statement 3 + Details 7 Conclusion
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keep away from the signs
keep away from the buildings
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hold onto the furniture
hide under the furniture
hide in the corner of the house
drop onto the ground
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Text Study Notes to the Text Words and Expressions
Idea Sharing Writing
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Structure Analysis Understanding Summary
Reproduction
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Text Study—Structure Analysis
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Signs
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Discussion
What shall we do if an earthquake happens?
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What can we do when the earthquake happens
If you are near the door
Run
Careful
If you are outdoors
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Two Reactions
Wrong Right
• Keep calm • To take shelter where you are
• Be panic • Run aimlessly
• Fear with one's eyes open • To go to narrow rooms for protection wide
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Text Study—Understanding
Para. 2
3. How are most of the people killed in an earthquake?
Tips Tip
By falling buildings.
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Text Study—Understanding
Para. 2
Tips
1) hens—cages 2) snakes—freeze to death 3) dogs—bark a lot 4) fish—surface 5) birds—noisy— fly unusually
More
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Text Study—Understanding
More
Some advance warnings of an impending earthquake.
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Text Study—Understanding
Para. 1
2. What animals show what signs of earthquakes?
I can predict earthquakes! Can seismologists do that?
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Text Study—Understanding
Tsunami
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Watch and Discuss
Earthquake is a sudden movement of the Earth’s surface, 3 6 sometimes causing great damage.
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The Origin of Earthquake:
Earthquakes happen because the outer layer of the earth (the crust) is slowly being deformed by stresses that are placed on the crust. These stresses build up along locked portions of the crust where e art h q u ak e f a ul t s ( 断 层 ) ar e . Eventually the stresses become too great for one of the faults to withstand( 承受 ), and the crust suddenly moves, like a spring that has been wound too tightly. This sudden movement of the ground is called an earthquake.
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What kind of disasters do you know?
fire
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typhoon / Hurricane
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snow slide
Leabharlann Baidu
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tornado
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sandstorm
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mudflow
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• drought
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volcano eruption
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flood
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Text Study—Structure Analysis
B. Complete the Main Ideas
Para. 1 predict when an earthquake is going to happen. To ________ prevent the great destruction of property To ________ caused by earthquakes.
1) Wire the earth and sea to detect movements. 2) Watch animals and plants for warning signings of earthquakes. 3) The amount of radon waxes before an earthquake.
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Scientists can’t tell that an earthquake is a foreshock until the larger earthquake happens.
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What do you think may happen before an earthquake?
• 1) The weather will become worse than usual. There will be strong wind, heavy rain and bright light in the sky and so on. • 2) Animals will become nervous. e.g. mice will run about; fish jump out of ponds; cows, pigs, horses and dogs will be upset. • 3) Water in rivers and wells will rises and falls. • 4) We will see cracks in the wells and the smelly gas will come out of the cracks. • …
• To jump from a building • To take an elevator • To run in bare feet • To shield one’s eyes from the fragments of broken glass • To take the stairs • To cut off the electricity • To wear a heavy or comfortable boots
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Text Study—Understanding
Para. 3
5. What should people do to prepare their houses?
Tips
1) Check/reinforce homes . 2) Place heavy objects in low place. 3) Attach cupboards & cabinets to walls. 4) Fasten doors .
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earthquake hazard（地震危害性）
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• uproot trees and knock off buildings • make the rivers change their courses • make the transportation system break down • cause power line failures • cause loss of life and property • trigger landslides,flooding and tsunamis • may cause infective deseases
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Text Study—Understanding
Para. 2
prepare for the possibility of a great earthquake. Para. 3~6 To ____________
Para. 7 Even if prediction becomes possible, people still have to do their best to prevent disasters by improving building structures and by _______ being _____________________________
4. What building structures might prevent the great destruction of property?
Tips
1) Steel joint/an I-joint 2) Equally strong columns & horizontal beams 3) Deep vertical support columns 4) Light roofs & strong walls