【正文】
e will depend on whether this problem can be solved. ⑤They were in time ______________(produce) carbon, nitrogen, water vapour and other gases. (2) Complete the sentences. ⑥As a result of this, many scientists believe that_________________________________(地球會(huì)變得太熱而不能居住). ⑦The earth became so violent that it was not clear whether the shape would last or not. Emotion amp。 science 情感與科學(xué)(Teachers guide Ss to discuss in groups and report their discussions to the whole class.) 1. How life began on earth is one of the biggest puzzles that scientists found hard to solve. What other puzzles are hidden in the passage? Find them out and do some research. puzzles: ________________________________________________________ 2. In order to make life continue on the earth, what we humans should do at present?We should_________________________________________________________________________________________________________________________ Step IV Talking and sharing 討論與分享(含自我總結(jié)與評(píng)價(jià))) Guide Ss to do selfevaluation:What have I learnt in this period?What am I still confused about? What should do to make them clear?6. Homework課后作業(yè) Search for more information about other ideas on the origin of life on the earth. Compare them with the theory learned in the text.