Unit4《Globalwarming》thefirstperiod课件（新人教版选修6）.ppt

;Unit 4; Teaching methods situational teaching method ; cooperative learning method; programmed teaching method; task-based and assessment teaching methods.;Teaching aims and demands;Arrangement of teaching;;energy sources;stove;Wind energy is used as power to produce electricity .;where electricity is produced by burning coals.;in which oil is refined and made pure. ;a facility designed to convert nuclear energy into electricity.; on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or heating your water.;are used to keep back water and raise its level for irrigation or for producing electricity, etc.;Guess it!;What source of energy?;Geothermal (地热的) Energy Plant; An energy source is “renewable” when supplies of it never run out and “non-renewable” when one day they will run out. Which energy sources on your list are renewable and which are non-renewable?;Things that use energy in your home;What are these buildings made of and what is their purpose? ;How does it work?;Greenhouse gases!;Homework