unit5warmingup课件新人教版选修6.ppt

Unit 5 ; Look at the diagram on the right. It shows a volcano erupting. What do you know about volcanoes? Share your knowledge with others in your class. Use some of the words on the diagram in your discussion.; Have you ever thought about how powerful nature is? Have you ever considered how weak humans are compared with a volcano, hurricane or earthquake? Yet, however weak we are, we are not completely powerless. In your groups discuss ways human being sprotect themselves from powerful natural forces.;earthquake;thunder/ lightning;volcano-eruption;What do you know about volcano? Do you know how a volcano erupts?;volcano-eruption; Get a more knowledge of volcano;Near the oceans.