文档介绍：Unit 4
Warming up and reading
Earthquakes
Have you experienced an earthquake?
Can you describe an earthquake you heard about?
Free talk
Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake.
Did you hear about Tangshan
Earthquake? When did it happen?
The Tangshan Earthquake was a
natural disaster that occurred on
July 28, 1976. It is believed to be
the largest earthquake of the 20th
century by death toll.
The number of deaths was around
240,000 to 255,000. A further
164,000 people were recorded as
being severely injured.
Film, Aftershock
What does the sentence “It’s always
quiet before a storm” mean?
What do you think will happen
before an earthquake?
1) Bright light flashes in the sky.
2) The well has deep cracks in it, and the water in it rises and falls.
3) Chickens are flying and dogs are barking, and pigs and cows are too nervous to eat.
4) Fish jump out of the pond, and mice run wildly out of the fields.
Signs before an earthquake
Fast reading
Read the text and find answers to the following questions.
1. When and where were the strange things happening? What were they?
2. Why did the text say the world
seemed to be at an end?
3. How was the city destroyed after the quake?
4. When did the second quake hit the city? What was the result of that?
5. Who came to help Tangshan first?
And how?