unit 3 Wacth out when nature strikes back

1、Words to be remembered in unit 2 lipstick face powder eyeliner hair mousse manicure facial mask Botox facelift liposuction beauty contest pageant makeup/make-up cosmetics accessory elimination gorgeous Im floored. My goodness.Watch the video clip and answer the questions. 1. What is the disaster in

2、the video clip? How do you feel about it? 2. What other natural disasters do you know? natural disasters flood洪水 tornado龙卷风 cyclone飓风 hurricane typhoon台风 tsunami海啸 EL Nino厄尔尼诺 earthquake地震 drought干旱 famine 饥荒 plague瘟疫 hailstorm冰雹冰雹 sandstorm沙尘暴沙尘暴 magnetic storm磁暴磁暴 snow storm暴风雪 Blizzard 暴风雪 Landsl

3、ide滑坡 debris flow泥石流/mudslide泥石流 volcanic explosion/eruption火山爆发 forest fire森林火 Secondary disasterDiscussion 1. What should we do before and during an earthquake? 2. What can government and the common people do to lessen the adverse impacts of drought?What to Do Before an EarthquakeMake sure you hav

4、e a fire extinguisher, first aid kit, a battery-powered radio, a flashlight, and extra batteries at home. Learn first aid. Learn how to turn off the gas, water, and electricity. Make up a plan of where to meet your family after an earthquake. Dont leave heavy objects on shelves (theyll fall during a

5、 quake). Anchor heavy furniture, cupboards, and appliances to the walls or floor. Learn the earthquake plan at your school or workplace. What to Do During an EarthquakeStay calm! If youre indoors, stay inside. If youre outside, stay outside. If youre indoors, stand against a wall near the center of

6、the building, stand in a doorway, or crawl under heavy furniture (a desk or table). Stay away from windows and outside doors. If youre outdoors, stay in the open away from power lines or anything that might fall. Stay away from buildings (stuff might fall off the building or the building could fall

7、on you). Dont use matches, candles, or any flame. Broken gas lines and fire dont mix. If youre in a car, stop the car and stay inside the car until the earthquake stops. Dont use elevators (theyll probably get stuck anyway). lessen the impacts of drought government carry out water conservancy projec

8、ts:reservoirs organize tree-planting to reduce greenhouse effects develop water saving agriculture introduce drought-resistant crops, ban water consuming projects prevent water pollution restrict factories carbon dioxide emissions to reduce greenhouse effectscommon people can do save water prevent f

9、rom polluting water lead a low-carbon life donate to drought-stricken areas help the people theirRichter scale 里氏震级 (a system of numbers for measuring how powerful an earthquake is)casualty n. 人员伤亡 (people injured or killed in an accident) e.g. First reports of the air crash tell of more than 50 cas

10、ualties.landslide n. 山崩，滑坡 (a heavy fall of earth and rocks down a side of a mountain or steep slope)typhoon n. 台风 (a tropical storm with strong winds that move in circles)molten lava 熔岩；岩浆 (rock in a hot liquid state flowing from an exploding volcano)destructive adj. 破坏性的 (causing severe damage or

11、harm) e.g. Earthquake is a destructive natural disaster. 1. it only measured 3.5 on the Richter scale. casualty 2. too risky 3. cancel arrangements 4. delay chaos consequences 5. fascinating weired thing molten lava1. Q: What is the mans opinion of the result of the earthquake? D) No loss of lives.2

12、. Q: What is Susan doing? A) Traveling to India.3. Q: Which of the following statement is true about the woman? C) She is staying home.Questions and key4. Q: What is the consequence of the typhoon? B) It made a mess of part of the city.5. Q: What is the mans description of lava? C) Beautiful and des

13、tructive.words of unit 3 1. the names of some natural disasters Richter scale casualty destructive chain reaction upstream/downstream aftershock reservoir evacuate all-clear visibilityAssignments 1. finish all the listening in unit3 2. recite words and spoken sentences in unit 3 3. preview unit 4 4.

14、 new report Facts about Earthquakea. Magnitude and intensity: Magnitude is a measure of overall earthquake size, which is related to the length of the fault that ruptures. Intensity is a measure of the effect of the earthquake at a specific location. b. The Richter Scale: It is a way of measuring th

15、e strength of an earthquake.c. Epicenter and hypocenter: Earthquakes occur when two pieces of the earth snap past each other along a fault. That fault is actually a crack that extends deep into the earth. The hypocenter is the point where the earthquake rupture begins, usually deep below the surface

16、 on this fault. The epicenter is the point on the surface directly above the hypocenter. Is tsunami delicious?tsunami n. 海啸 (a huge ocean wave caused by an underwater earthquake or volcanic eruption)sushi n.（日本）寿司 (cooked rice rolled around bits of fish or vegetable then sliced into small portions)s

17、wallow up 淹没 (drown) e.g. The huge flood swallowed up the whole village.pound v. 连续重击 (hit something several times with a lot of force) e.g. He pounded the table with his fist because of anger.(To be continued)tremendous adj. 巨大的，重大的 (extremely great, important or strong) e.g. I felt a tremendous pr

18、essure before the interview.chain reaction 连锁反应 (a series of events in which each causes the next)crush v. 压碎，碾碎 (press with great force so as to break or smash) e.g. Listen to criticism but dont be crushed by it.toss v. 扔，抛 (throw something, especially something light) e.g. He tossed the can of bee

19、r, and took one himself.(Continued)1. Q: What does the son think a tsunami is? B) A kind of food.2. Q: What does the mother imply by saying, “If we had a tsunami, it would be the other way around”? C) They would be swallowed up by the ocean waves.3. Q: What does the son think surfing on tsunami wave

20、s would be like? A) Cool.Questions and key4. Q: Which of the following is NOT mentioned as the cause of a tsunami? D) A warm current.5. Q: How high can tsunami waves reach? C) 30 meters.What do you know about tsunami?A tsunami is sometimes called a “tidal wave”. However, it has to do with earthquake

21、s, not tides, so the “proper” name is tsunami. A tsunami is a great wave originating in the ocean due to an abrupt change in the ocean floor caused underwater fault rupture or landslides, typically triggered by earthquakes.A tsunami is usually caused by an underwater earthquake or volcanic eruption

22、or landslides. A tsunamis birth depends on vertical displacement of the seafloor. The speed of the tsunami depends on how deep the water is. Seafloor shape can influence a tsunami, however. Regions with many sea stacks and seafloor roughness will tend to reduce the tsunami amplitude. Near-shore seaf

23、loor shape is very important and may focus or defocus waves along the coast.(To be continued)(Continued)One of the biggest tsunami happened on December 26, 2004 in the Indian Ocean. It killed thousands of seaside tourists and residents living at seaside, covering all the countries facing the ocean,

24、including Indonesia, Thailand, Malaysia, India, Sri Lanka and many other countries. The loss caused by the tsunami was beyond description. But the tsunami has raised peoples awareness of tsunami hazards. Drought in South Africadam n. 水坝 (a wall built across a river to regulate the water level)water

25、table 地下水位sink v. 挖 (push something sharp into something solid) e.g. If they carry on sinking boreholes then the land is likely to sink.impose v. 强制实行 (introduce something such as a new law or new system, and force people to accept it) e.g. Many companies have imposed a pay freeze because of the eco

26、nomic crisis.irrigate v. 灌溉 (supply land or crops with water) e.g. None of the water from the lake is used to irrigate the area.(To be continued)maize n. 玉米sow v. 播种 (place seeds in the ground for future growth) e.g. What you reap is what you sow.seedling n. 秧苗 (a young plant)scorch v. 烤焦；烧焦 (burn s

27、omething slightly so that it changes color or is damaged on the surface) e.g. The bomb scorched the side of the building.livestock n. 家畜 (domestic animals such as cattle or horses)dry spell 干旱期 (a dry period; drought)slaughter v. 屠宰 (kill animals for food) e.g. Elephants are still being slaughtered

28、for commercial gain.(Continued)Key 1. The water levels at some dams have dropped to under 20 percent while the ground water table has dropped by 30 percent. 2. The government has to open the dams to provide more water for the people. 3. Water for farming must be restricted because peoples daily use

29、of water cannot be reduced further. 4. Maize farmers have to wait for one week to plant their crops. 5. About 40,000 head of livestock have died because of the drought.FFFTTWork in groups and then have a discussion on the following questions:1. Which of the following natural disasters do you think i

30、s the most frightening: earthquake, forest fire, volcanic eruption, hurricane, tornado, or flood? Give your reason.2. What natural disasters have you (or someone you know) experienced? Tell about what happened.3. Do you know any natural disasters happened in China? How much damage did it cause? How

31、did the community respond?adverse adj. 不利的不利的 (unfavorable or harmful) e.g. It is said that the managers decision would have no adverse effect on the progress of the company.hailstorm n. 雹暴雹暴 (a storm with hail)tornado n. 龙卷风龙卷风 (a violent storm with very strong winds that move in a circle)mudslide

32、n. 泥流泥流 (a mudflow, especially a slow moving one)eruption n. 爆发爆发 (a sudden, often violent outburst)Natural disasters(To be continued)precipitation n.（术语）降水（如雨、雪、冰雹）（术语）降水（如雨、雪、冰雹） e.g. But with no signs of any precipitation, the prospect of the harvest looks bleak. famine n. 饥荒饥荒 (a serious lack of

33、 food that continues for a long time and causes many people to become ill or die)thunderstorm n. 雷暴雷暴 (a heavy storm with thunder)upstream n. 上游上游 (in the direction opposite to the current of a stream)downstream n. 下游下游 (in the direction of a streams current)burst n. （河水）冲决（河水）冲决 （堤岸）（堤岸） (water ris

34、ing above the sides and spreading over the surrounding area)(Continued)KeyTopics DescriptionsNatural disastersAdverse natural phenomena such as flood, (1)_, hailstorm, heat wave, forest fire, hurricanes, typhoons, tornado, (2)_, landslide and mudslide, or volcanic eruption.Relationship between two d

35、isastersA(n) (3)_ earthquake may (4)_ a tsunami. While there is a long (5)_ in one area, there may be a great (6)_ in another. droughttsunamiundersearesult in dry spell flood(To be continued)Work in groups and then have a debate on the following proposal:Human beings can conquer the nature through t

36、he development of technology.An earthquake in HaitiHaiti 海地海地 (a Caribbean country)Caribbean 加勒比海的加勒比海的tumble v. 跌倒跌倒 (fall down) e.g. Share prices continued to tumble today on the stock market.manpower n. 人力；劳动力人力；劳动力 (all the people who are available to do a particular job or to work in a particul

37、ar place) e.g. There is a shortage of skilled manpower in the industry.presidential adj. 总统的总统的 (of the president) e.g. There are several presidential candidates.tremor n. 颤动颤动 (earthquake; slight shaking movement)e.g. He felt a tremor a moment ago.crust n. 地壳地壳 (the hard outer layer of the Earth)1.

38、 Script and key(To be continued)Disaster has struck in Haiti. An earthquake of huge proportions (1)_ in the Caribbean islandone of the poorest communities in the West. Buildings, which were badly built, tumbled, (2)_ thousands of people in their own homes.Haiti is a poor country with (3)_ emergency

39、services to help. The islanders had to use their bare hands to search for their families. They waited for teams from (4)_ countries like Britain and the United States to bring equipment and manpower to help (5)_ any survivors they could find.eruptedburyingfewoverseasrescue(Continued)(To be continued

40、)Its feared that more than 100,000 people have died. One school friend lies (6)_ on the pavement. Another voices her sorrow. The historic cathedral was badly (7)_; and at the presidential palace, the roof collapsed.The (8)_ here know about earthquakes. Haiti lies in an area where there are frequent

41、tremors and also tropical storms. But last weeks earthquake registered (9)_ on the Richter scalealmost as high as the scale can go. It was the (10)_ for 200 years. It happened eight kilometers beneath the Earths crustthats quite (11)_ to the surface, so the tremors were really strong.injureddamagedi

42、slanderssevenbiggestclose(Continued)There were also lots of (12)_tremors that happen after the main earthquake. Those aftershocks can also cause damage as buildings collapse further and (13)_ people who might have survived the first disaster.The British government has promised (14)_ of aid to help H

43、aiti, and many people have also made donations.Now the concern is to prevent (15)_ hitting areas without clean water or enough medical help.aftershockstrap 20 million poundsdiseaseCan you believe that a lake can also kill people? Then watch the video clip below from American National Geography chann

44、el.1. What is the cause of killer lakes?2. At what concentration level, such gas may kill people?3. How fast will it kill?Main idea of the video clip:There is a quiet, silent killer thats lurking (潜伏潜伏) about in the trees, along the Horseshoe Lakes edge. The cause is the high concentrations of carbo

45、n dioxide. Around 100 tons of the gas escapes around Horseshoe Lake each day, raising the level of carbon dioxide in the soil up to 95 times normal levels. At a concentration level of around 1 percent, carbon dioxide causes dizziness, headaches and hallucinations (幻觉幻觉). Above 17 percent, unconsciousness and death happens in a matter of seconds.Listen to a song by Molly Hatc