Unit+4+公开课+G.ppt

Unit 4 Astronomy: the science of the starsGroup competition•1. Warming up •2. Fast reading•3. Careful reading •4. Practice•5. DiscussionWinner: get a special giftLoser:  ON THE EARTHHowLIFE BEGAN?Warming upEach religion or culture has its own ideas about how life began on the earth. In Chinese legends…___________ separated(分分) the sky from the earth.Panguskyearth_____________ made human beings.Nuwa(女娲女娲)In western countries:______________ created the world and all living things.God In scientifictheory ?Para.1Para.2Para.3Para.4Para.5universeearthwaterplants & animalsGet the main ideas humans the formation(形成形成)of the ________ the formation of the ________ the development of ______________the importance of ________the development of _______Fast readingAtomsPara.1: the formation of the universe How was the universe formed?Starsother bodiesmatterCareful readingThe “big bang” threw _______ in all directions.________ began to form and combine.______ and _____________ were created.Big BangThe earth was still a cloud of______ dustThe dust settled into__________Para 2: the formation of the eartha solid globeIt became so________and _______ loudly with fire and rock.explodedviolentthe earthatmosphere …which were to make the earth’s ____________.…________ cooled down, water began to appear on its surfacePara 3: the importance of water ★★ Water is fundamental(重要重要) to the development of life. Why?--This produced a chain reaction, which made it possible__________________.--What many scientists believe is that the continued presence of water allowed the earth to_____________________________into the oceans and seas. dissolve harmful gases and acids for life to developSubjective Clause(主语从句主语从句)Whether the earth is becoming warmer is a hot topic.地球是否会变暖地球是否会变暖是一个热门的话题。

是一个热门的话题 连词连词+ 陈述语序的句子陈述语序的句子许多科学家相信的许多科学家相信的是水的长期存在是水的长期存在…What many scientists believe is that the continued presence of water …我们需要的我们需要的是更多的练习是更多的练习is more practice.What we need他是否会来他是否会来还是一个问题还是一个问题 is still a problem.Whether he will come (or not) 连词连词+ 陈述语序的句子陈述语序的句子Put them in correct order:( ) 1. insects and amphibians( ) 2. dinosaurs ( ) 3. small plants on the surface of water( ) 4. reptiles ( ) 5. green plants on land( ) 6. shellfish and all sorts of fish ( ) 7. clever animals with hands and feets( ) 8. mammalsPara 4&5:The development of life 1 2 3 4 5 6 7 8shellfish & fishSmall green plantsGreen plantsGreen plantsinsects & amphibiansinsects & amphibiansreptilesdinosaursdinosaursMammalsClever animalhuman beings2 points2 points2 points12 points234Rules▲ Choose any number and answer the question behind it, then you will get scores for your group.▲ If the students in one group fail to answer the question, any student can get the chance to win scores for his/her group.2 points2 points2 points12 points234Have a try!Because dinosaurs died out long before human beings developed on the earth.Why is it wrong in films and stories to show dinosaurs and people together?（（2分）分）1What will life and the earth be like in the future?DiscussionScientists say: The earth may become ______________ because too much _______________ in the atmosphere ________ heat _____ escapingfrom the earth. too hot to live oncarbon dioxideprevents from2Reading Comprehension1、、Where can you find the passage? (1分分) A. in a science book B. in a magazine C. in a newspaper D. in a guidebook2. Why was it necessary for plants to grow before animals?（（1分）分） A. Animals needed plants to protect them from the sun. B. Plants provided oxygen for animals to breathe. C. Animals could hide from hunters in the forest. D. It was easier for plants to grow.3 ____________ shocked everybody.1 1、、他所说的他所说的使我们震惊。

使我们震惊1(1分分) )_____________hasn’t been decided.Practice2 2、、我们要去哪里我们要去哪里还没有决定还没有决定1 1分）分）Have a try!What he said4Where we’ll goHow to protect the earth and make it a better place to live on?DiscussionHomework: Shorten the passage in the order of time with 120 words or so.。