1、Astronomy:the science of the stars 编号 001【学习目标】students understand the texts forms and contents and learn about festival Astronomy 【教学重点】 the words and the expressions in the text 【教学难点】 How to enable the students to grasp the usages of words and in order to and understand some difficult and long se
2、ntences .【知识链接】科学家透露：宇宙可能有两个我们的宇宙和一个“隐藏的“ 宇宙共同 “镶嵌“在“五维空间“中。在我们的宇宙早期，这两个宇宙发生了一次相撞事故，相撞产生的能量生成了我们宇宙中的物质和能量。【自主预习】Do you know how the universe began?I n the 1920s in California, astronomer Edwin Hubble observed distant galaxies using an e xtremely powerful telescope. He made two mind-boggling (unbelie
3、vable) discoveries. First , Hubble figured out that the Milky Way isnt the only galaxy. He realized that faint , cloud-like objects in the night sky are actually other galaxies far, far away. The Milky Way is just one of billions of galaxies. Second, Hubble discovered that the g alaxies are constant
4、ly moving away from each other. In other words, the universe is expanding. The biggest thing that we know about is getting bigger all the time. A few years later, Belgian astronomer Georges Lematre used Hubbles amaz【自学检测】a cloud of energetic dust_ combine into_become violent_ the solid surface_explo
5、 de loudly_ produce the water vapor_make the earths atmosphere_cool down_ be different from_ disappear from_show ones quality_dissolve harmful gases_, develop life_encourage the development of_ produce young_lay eggs_spread all over the earth_, move around_, go by_ preventfrom_escape from into_, bec
6、ome hot_depen d on_【预习疑问】【课堂探究】Task 1 Scanning the text to answer the questions below .1. What is the original earths atmosphere made up of? 2. What is the fundamental to t he development of life?3. Which kind of life-being first appeared on the earth, plants or animals? 4.Choose the main idea for e
7、ach paragraph( )The arrival of humans and their impact on the earth.( )The formation of the earth.( )The development of plants and animals on the earth.( )A widely accepted theory about the formation of the universe.( )The importance of water for life.Task 2 Detailed reading （ ）A Insects and amphibi
8、ans appeared. （ ）B Dinosaurs appeared. （ ）C The earth became a solid ball. （ ）D Small plants grew on the water. （ ）E Rep tiles appeared. （ ）F Plants began to grow on dry land. （ ）G The earth was a cloud of dust. （ ）H Water appeared on the ea rth. （ ）I Shellfish and other fish appeared. （ ）J The univ
9、erse began with a “Big Bang”. （ ）K Clever animals with hands and feet appeared. （ ）L Mammals appeared.Task 3 Post readingAfter reading the passage, discuss the following questions.1. Why was the earth different from the other planets?2. Why is it wrong to show films with dinosaurs and people togethe
10、r?【总结反思】a cloud of energetic dust（具有能量的尘埃）, 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）, explo de loudly（猛烈爆炸）, in time （及时，最终）, produce the water vapor（产生水蒸汽）, make the earths atmospher e（构成了地球的大气层）, cool down（冷却）, on the surface （在表面）, be different
11、 from（与不同）, go round the sun（环绕太阳运转）, disappear 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）, l
12、ive on land（在陆地 上生活）, live in the sea（在海里生存）, grow into forests（长成森林）, produce young（生出幼仔）, lay eggs （下蛋）, animals wi th 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）, pre
13、ventfrom（防止做）, escape from into（从逃离到 ）, become hot（变热）, depen d on.（依靠，依赖，取决 与 ）, solve a problem（解决一个问题）1.carbon, nitrogen, water vapour, and other gases2.Water3. At first, small plants began to appear on the surface of the water, they produce oxygen, which encouraged the later development of early shellfish and all sorts of fish.5-2-4-1-38-10-3-5-9-7- 2-4-6-1-12-11Post readingBecause the water remained on the earth.Because dinosaurs died out long before human beings developed on the earth.
