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北师大2003课标版《Lesson 3 Natural Disasters》公开课PPT课件优质课下载
typhoon
hurricane
volcanic eruption
tsunami(海啸)
landslide (山崩)
Caused by people
natural
Made worse by people
forest fires
hurricanes
droughts, earthquak, floods,
landslides, tsunamis, hurricanes,
typhoon, volcanic eruptions,
forest fires, hurricanes
What caused those disasters? Which are caused by nature? Which are caused by people?
Some natural disasters have become common.
Volcanic eruptions& earthquakes have always been a threat to our world.
Causes of natural disasters.
Volcanoes and earthquakes are even more dangerous than in the past.
Experts predict that natural disasters will get worse.
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