Unit 5 The power of nature[下学期]

课件22张PPT。Unit 5 The Power of NatureRemember what happened on Dec 26, 2005?Warming uptsunamiDo you know any other natural disasters ?
Please work with your partners
and make a list of natural disasters .earthquakefloodsdroughtthunder/ lightningtornado/cyclonehurricane /typhoonvolcano-eruptionWhat do you know about volcano?
Do you know how a volcano erupts?volcano-eruptionBoiling rock erupts from the crater;
the lava flows slowly down the mountain. Magma chamberLavaCraterAsh cloud/volcanic ashMore about the volcano1. How is a volcano formed?The rocks under the earth becomes hotter and hotter
and erupted from the mountain.Near the oceans.Where is most possible for a volcano
to erupt?An extinct volcanoHaleakala Crater, the largest dormant volcano in the world
Maui, Hawaii
An active volcano3. What types of volcanoes do you know?dormant volcanoWhat qualities are needed for a volcanologist?
Are you suitable for being a volcanologist ?
Answer “yes”or “no” to the following questions.Pre-readingPredicting
(预测) What might be talked about?What is the writer?
When did he first see an eruption? How did it look like?
What was he wearing when getting close to the crater? And what was the result?SkimmingWhile-readingWhat is the writer?
When did he first see an eruption? How did it look like?
SkimmingHe is a volcanologist working for
the Hawaiian Volcano Observatory.
He mainly collects information about
Mount Kilauea.It was in the second week after he arrived in Hawaii.
It was very bright although it was night.
Red lava fountained hundreds of meters into the air
and it was a fantastic sight.3. What was he wearing when getting close to the crater? And what was the result?He was wearing white protective suits that covered his whole body,
helmets, big boots and
special gloves,
just like a spaceman.
As a result, it made him difficult to walk.1. Why is a volcanologist’s job important?
2. Why is the lava that flows on Mount Kilauea more dangerous than the actual eruption?
3. Why did the scientists have to get close to the volcano after it began erupting?
What does the writer find impressive
about volcanoes even after studying
them for 20 years?
Scanning1.Why is a volcanologist’s job important?
Volcanologists study volcanoes so that they
can warn people when the volcano is going to
erupt and so save many lives.

2. Why is the lava that flows on Mount Kilauea more dangerous than the actual eruption?
The lava flows down the mountain and can cover up or burn villages in its path.
The rocks that erupt from the volcano usually don’t damage anything
because no one lives near the crater.
3. Why did the scientists have to get close to the volcano after it began erupting?
The scientists needed to get samples of the lava
so they could study them.
4. What does the writer find impressive about volcanoes even after studying them for 20 years?
The author is impressed by the beauty of the eruption and also by
its potential to cause great destruction.Part 1(Pa 1-2)
Part 2(Pa 3-4)

Part 3(Pa 5)

The writer’s job and its importance The writer’s experience of watching the volcano eruptionThe reasons for the writer’s enthusiasm about his jobMain ideas
Suppose you are a reporter of the 21st Century, and you are interview the writer.
Work in pairs and make up a dialogue
according to your understanding of the passage.Dialogue production
1. Having learnt a little more about the work of a volcanologist, do you think it is an occupation you would enjoy? Discuss your reasons with others in your class.
Discussion Assignment (Homework) Find out words, expressions and sentences which you think are useful, important or difficult to understand.
Finish exercises in Learning about Language. (Exx 1, 2)