Unit Four :

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Unit Four Earthquake
Period One Warming up
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What has happened?
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I. Warming-up
1.Say something about these two cities. What
will happen before an earthquake?
Tangshan
San Francisco
Tangshan is a beautiful city with gardens, wide
roads.
San Francisco is a city with tall buildings
thickly standing on the earth.
These two cities are famous for their earthquakes
during a period of calm. So one should not trust
situations that seem peaceful since bad things
may happen.
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1.Which of the following may cause people the
greatest damage? A Earthquake BTyphoon
CFlood DDrought
2.Do you know what would happen before an
earthquake?
----There is often a great sound. -----Animals
too nervous to eat ----There are bright lights in
the sky. ----A smelly gas may come out of the
well. ----Water pipes may crack or burst.
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2. What do you think may happen before an
earthquake?
Before an quake, animals will become nervous.
Cows, pigs, horses and dogs will be upset. Mice
will run about and fish will jump out of water.
In winter, people can even see snakes. So
earthquake is predictable.
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Imagine there has been a big earthquake,what will
happen to the things around us?
cracks, cut across houses, roads and canals, fall
down, lie in ruins, destroy, damage, loss
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3.What can we do to keep ourselves safe from an
earthquake?
4.When an earthquake happens,you are escaping
from home,what will you take with you?Why?
5.Talk about the great earthquakes that have ever
happened in the world?What damages they caused?
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Natural disasters occur throughout the world, and
China has a particular problem with earthquakes.
Tangshan earthquake in 1976 is a case in point.
So it is especially important to take steps to
reduce the damage caused by quakes.
Seismology the study of Quake
recordings the person
who studies quakes.
the machine to record
seismic waves. the
inventor of the 1st seismology
Seismologist
Seismometer
Zhang Heng in Han Dynasty
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• Homework
• Talk about a big earthquake that happened in the
  world with your partner.
• List out the measures that people can take when
  an earthquake happens.