What happened in the Indian Ocean at the end of 2004?A terrible tsunami(海啸海啸) broke out there on 26th December. More than 200,000 people were killed.Question A tsunami(海啸海啸) is an undersea earthquake.Task1 Do you know any other natural disasters? natural disastersfloods(洪水洪水)drought(旱灾旱灾)hurricanes (飓风飓风)typhoons (台风台风)mudflow/landslide (泥石流泥石流)volcanic eruption(火山爆发火山爆发)earthquakeLets talk something about earthquakesTask2Can you tell some famous land earthquakes(地震地震)? San Francisco 1989The Tangshan Earthquake in 1976What can we do to keep ourselves safe from an earthquake?Imagine your home begins to shake and you must leave it right away. You have time to take only one thing. What will you take? Why?personal washing thingsa bottle of water moneytorch(手电筒手电筒)mobile phonefood and sweets blanket (毯子毯子)What will you take with you?medicineDo you know what would happen before an earthquake?Animals are too nervous, such as cows, pigs, horses, and snakes, etc.Can we avoid( 避免避免)or reduce (减少减少)the damage?We can foretell(预测预测) earthquakes. How to foretell an earthquake?Lets look at some signs(前兆前兆).What do you think may happen before an earthquake?People can see bright lights in the sky. The sound of planes can be heard outside even when no planes are in the sky.Mice will run out of the fields looking for places to hide. Fish will jump out of the bowls or ponds.Animals will be too nervous to eat. Farmers wives will notice that the well walls have deep cracks in them. The water will rise and fall, rise and fall for a few days. Steam will burst from holes or wells in the ground.Predictions of an earthquake:1) Bright lights flash in the sky; 3) The well walls have deep cracks with smelly gas;4) Animals are too nervous, such as cows, pigs, horses, and snakes, etc; 5) Mice run out to look for places to hide; 6) Fish jump out of the ponds.2) The water in the well rise and fall;If there is an earthquake, what will happen?Roads get huge cracks.Steam burst from holes or wells in the ground. Water pipes are destroyed.Houses fall down. Bricks cover the ground . Brick building are destroyed.Factories,hospitals,buildings are gone.Dams and bridges fall down. Hard hills of rock become rivers of dirt .Railway tracks are now useless pieces of steel.People died and injured. Families are killed and many children are left without parents.A few seconds, a large city lies in ruins. Everything is destroyed. It seems the world was at an end.What shall we do or not do if an earthquake happens?DiscussionsDos Donts1.Stay in a small room,suchas kitchen or bathroom2.Hide under the table or bed , if you havent time to escape , you may standclose to the inside wall withsome things covering on the head.3.If you stay in the open air ,keep off the tall building, and go to the fields without trees .1. Be close to the outside wall2.Stay on the balcony3. Jump out of the tall building4. Use the lift HOMEWORK :Prepare for Reading.同学们来学校和回家的路上要注意安全同学们来学校和回家的路上要注意安全