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1、Unit4 astronomy: the science of the starsPeriod 1 Warming up & ReadingLearning aimsmaster the words in the reading passage.to be able to get the main idea and the detail information from the textto be able to answer some questionns about the text.to be able to finish the rational clozeLearning proce
2、duresstepI translate the words into Chinese.astronomy system religion theory billion globeviolent carbon atmosphere unlike fundamentalstepII match the both1) How old is the earth? paragraph12) How does the universe begin? paragraph23) Is there any water in the Mars? paragraph34) When did dinosaurs d
3、isappear? paragraph45) Which animal is the most important one on the earth? paragraph5stepIII Conclude the main idea of each paragraph1) A widely _ about the _ of the universe.2) The formation of the _.3) The _ of water for life.4) The development of _ and _ on the earth.5) The arrival of _ and thei
4、r _ on the earth.stepIV Put these sentences into the right order.A. The earths atmosphere was formedB. Big BangC.The earth exploded and produced kinds of gasesD. Water appearedE. The earth cooled down F. A cloud of energetic dustG. Slowly combine into a solid globe stepV. Detailed reading , answer t
5、he questionsReading strategy: Read the passage carefully paragraph by paragraph and try to get more information. Then answer the questions.Para 1&2: the formation of the universe and the earth1.About how the universe began, which theory is widely accepted?2.What form（形状） was the earth after the “Big
6、 Bang”?3.What made up the earths atmosphere after the earth exploded?4.In the sentence “It exploded loudly with fire and rock. They were in time to produce carbon, nitrogen”here “they” refers to_. “In time” means_.Para 3 the importance of water for life What made the earth different from the other p
7、lanets is that _ remained on the earth.The significance of the continued presence of water is that it allowed_.Para 4 The development of life 1.small plants in the water 2._ 3._ 4. Insects on land 5._ 6._ 7._ 8.dinosaurs 9_ Para 5 the arrival of humans and their effects on the earth1. What problems
8、have been caused by humans to the earth?2. What does the last sentence mean?stepVI. summaryAfter the “big bang”, the earth was still just a cloud of _,it _loudly with fire and rock, which were _ to produce _, nitrogen, water vapor and other gases. Then _ began to appeared on the earth. _ in water ar
9、e considered to be the earliest lives on the earth. The _they supplied encouraged green plants grew on land, which were followed by _. When the plants grew into_, _ disappeared later, which made the rise of _ on the earth. 附Collocations from HOW LIFE BEGAN ON THE EARTHa cloud of energetic dust（具有能量的
10、尘埃）, combine into（合成）, move around the sun（环绕太阳运转）, become violent（变得激烈）, the solid surface（固体表面）, explode loudly（猛烈爆炸）, in time（及时，最终）, produce the water vapor（产生水蒸汽）, make the earths atmosphere（构成了地球的大气层）, cool down（冷却）, on the surface（在表面）, be different from（与不同）, go round the sun（环绕太阳运转）, disapp
11、ear from（从消失）, stay on（存留在）, show ones quality（显现某人的特性）, dissolve harmful gases（分解，溶解有害气体）, become part of（变成的一部分）, develop life（发展生命）, grow in the water（在水里生长）, fill with（用来填充，充满了）, encourage the development of（鼓励的发展）, millions of years later（几万年以后）, live on land（在陆地上生活）, live in the sea（在海里生存）, gr
12、ow into forests（长成森林）, produce young（生出幼仔）, lay eggs（下蛋）, animals with hands and feet（长着手脚的动物）, spread all over the earth（遍布全世界）, develop new methods（发展了新的方法）, grow food（种植）, move around（迁徙）, go by（过去，推移）, take care of（在意，照看好）, putinto（把带入，放入）, preventfrom（防止做）, escape from into（从逃离到）, become hot（变热）, depend on.（依靠，依赖，取决与）, solve a problem（解决一个问题）2
