高中人教版 (2019)Unit 4 Natural disasters课堂教学课件ppt

这是一份高中人教版 (2019)Unit 4 Natural disasters课堂教学课件ppt，文件包含人教版高中英语必修第一册UNIT4导读话题妙切入课件ppt、人教版高中英语必修第一册UNIT4导读话题妙切入学案doc等2份课件配套教学资源，其中PPT共11页， 欢迎下载使用。
1．Unity is strength.团结就是力量。2．The first in time and the first in importance of the influences upon the mind is that of nature.—Emerson在所有对头脑的影响之中，大自然的影响可谓在时间上最先，在作用上最为重要。——爱默生3．There is kindness to be found everywhere.人间处处有温情。4．The earth is our only home­planet.地球是我们唯一的家园。5．The fear of the disaster is worse than the disaster itself.对灾难的恐惧比灾难本身更可怕。Never give upNever give up，Never lose hope.Always have faith，It allows you to cope.Trying times will pass，As they always do.Just have patience，Your dreams will come true.So put on a smile，You'll live through your pain.Know it will pass，And strength you will gain.Now,  let's talk about earthquakes on our planet. Some countries have large numbers of earthquakes.  Japan is one of them.  Others do not have many.  For example, there are few earthquakes in Britain.There is often a great noise during an earthquake. The ground vibrates(震动). Houses fall down. Trains run off the lines.Sometimes, there is a heavy loss of human lives.Earthquakes often happen near volcanoes, but this is not always true.  The centers of some earthquakes are under the sea.  The bottom of the sea suddenly moves.  The powerful forces inside the earth break the rocks. The coast is shaken and great waves appear. These waves, also known as seismic waves  (地震波) or tsunamis, can travel long distances and rush over the land when they reach it. They are strong enough to break down houses and other buildings.  Very often fires follow the most  serious  earthquakes. In the 1906 San Francisco earthquake, a numbers of fires were burning in the city.  The water pipes were also shaken and broken, so it was not possible  to put the fire out. There was no water. The Tokyo Earthquake  of 1923 happened just before noon. People were cooking meals  on their fires at that time.  When the ground shook, the fires  shook, too. Hot materials were thrown on the different parts of  the houses, some of which were made of wood. Soon 134 fires  were burning in the city.What kind of building stands up best in an earthquake? A  building with concrete walls is perhaps the best. A steel frame  will make it even stronger. The frame holds the different parts together and the walls will not easily fall. There is less chance of fire because concrete and steel do not burn. Over the years，scientists studied the results of earthquakes in different parts of the world, and they are sure that this kind of building is the safest.[探索发现]1．Find out the main topic of the passage.Earthquakes.2．Find out what may cause undersea earthquakes.The_powerful_forces_inside_the_earth.3．Find out the main idea of the last paragraph. A_building_with_concrete_walls_and_a_steel_frame_stands_up_best_in_an_earthquake.