1、Unit4 Warming up and Reading,Astronomy: the science of the stars,Warming - Up,Lead-in,Reading ( Pre-reading; skimming; careful-reading; Extensive reading; ),Discussion,江西省高安中学 高一英语 卢黎仕,人教课标版英语必修三,What is the girl doing?,What a beautiful sky!,Brain - storming,Can you find other adjectives to describe
2、 the beautiful night sky? wonderful fantastic charming romantic attractive ,Appreciation,Astronomy: the science of the stars,Unit 4,Astronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it.,astronomer,Mercury,Venus,Earth,
3、Mars,Jupiter,Saturn,Uranus,Neptune,金星,地球,火星,水星,木星,土星,天王星,海王星,Are you interested in astronomy?If you were an astronomer, what else would you like to know about the universe?,How the universe began?How life began?Is there life on other planets?Are there other life forms in the universe?Whats in the Bl
4、ack Hole?,Pre-reading,Speaking,Each religion and culture has its own ideas about how life began on earth. What do you know?,Big Bang,In the Chinese legend, it says_ creates the world. He _ the sky and the earth and his _then turns into all kinds of things in the universe.,Pan gu,seperates,Whole body
5、,女娲补天,It is said that the sky is supported by four big _ However, there appeared a big hole, nvwa fill the hole with _.After that, she made humans from _.,columns.,stones,mud,In Bible, the world and the whole universe was created by _. Then the God creates the first man and the first woman_,the God,
6、Adam and Eve（亚当和夏娃）.,The big bang,However, scientists believe that about 15 billion years ago, a huge explosion which is called “Big Bang” happened, creating our universe.,the explosion,The Big Bang,Lets enjoy the beautifu scene,LIFE BEGAN,ON THE EARTH,How,?,Read the title and look at the pictures.
7、Predict what the reading will be about. Then read it quickly to check if you are right.,HOW LIFE BEGAN ON THE EARTH?,skimming,Skim the passage and match the main idea with each paragraph.,Para. 1 The formation(形成) of the earth.Para. 2 The importance of water for life.Para. 3 A widely accepted theory
8、 about the formation of the universe.Para. 4 The arrival of humans and their impact on the earth. Para. 5 The development of plants and animals on the earth.,Discussion,1. Whats the main idea of the text?,2. If the text can be divided into two parts, how can we divide it and what are their main idea
9、s?,How life began on the earth.,Part 1 (para 1.2.3)Part 2 (para 4.5),Water made it possible for life begin to develop.,The development of living things.,Another Way to analyze the text structure,Main body,Para 1:,Para 2:Para 3:Para 4:,Para 5:,The arrival of humans and their impact on the earth.,Huma
10、n beings,A widely accepted theory about the formation of the universe.,The formation of the earth.,The importance of water for life.,The development of plants and animals on the earth.,life development,Big Bang,Read the text carefully and find more information,Careful - reading,Put the order of deve
11、lopment of life into a time line.,（ ） 1 Insects and amphibians appeared.（ ） 2 Dinosaurs appeared.（ ） 3 The earth became a solid ball.（ ） 4 Small plants grew on the water. （ ） 5 Reptiles appeared.（ ） 6 Plants began to grow on dry land.（ ） 7 The earth was a cloud of dust.（ ） 8 Water appeared on the ea
12、rth.（ ） 9 Shellfish and other fish appeared.（ ）10 The universe began with a “Big Bang”.（ ）11 Clever animals with hands and feet appeared.（ ）12 Mammals appeared.,1,2,3,4,5,6）,7,8,9,10,11,12,The big bang,a cloud of dust,a violent solid ball,exploded with fire and rock,produced water vapour and gases,a
13、tmosphere,water appeared,Cool down,Life began,Para1 , 2 & 3,1. Small plants in water,2 ._ and all sorts of fish,3. Green _ on land,4. _ (on land),5. Amphibians (on land and in _),6. Plants grew into _.,8. _ (on land),9. _ (on land),Para. 4 & 5Talking about the development of life,7. _ (on land),10.
14、_ (small clever animals on land),Shellfish,Insects,water,plants,forests,Reptiles,Dinosaurs,Mammals,Human beings,1. Why was the earth different from the other planets? Because water remained on the earth.The significance(意义) of the continued presence of water is that it allowed the earth to dissolve
15、harmful gases and acids into the oceans and seas.,Extensive reading,Extensive reading,2. Why did the plants grow before the animals came? Because plants provided oxygen for animals to breathe.3. Why is it wrong to show films with dinosaurs and people together? Because dinosaurs died out long before
16、human beings developed on the earth.,Extensive reading,4. There used to be nine planets in the solar system. Recently scientists have decided that one of them can no longer be considered a planet. Do you know the name of that planet? Do you know why they removed it? The name is Pluto. Scientists now
17、 think it is too small to be called a planet.5. What problem is caused by human beings? Human beings cause global warming.,The Big Bang,Enjoy the text while watching the video,A cloud of dust,After the “Big Bang”, the earth was just a cloud of energetic dust.,A solid ball,What it was to become was a
18、 mystery until the dust began to slowly combine into a ball moving around the sun.,Violent earth,The problem was that the earth became violent because it was not clear whether the solid shape was to last or not. It exploded loudly with fire and rock,Atmosphere,Which were in time to produce the water
19、 vapour, carbon dioxide, oxygen, nitrogen and other gases, which were to make the earths atmosphere.,Presence of water,As the earth cooled down, water began to appear on its surface. Nobody knew that it was going to be different from other planets going round the sun.,Water stayed,Water had already
20、disappeared from planets like Mars or satellites like the moon ,but it stayed on the earth.,Moon,Mars,special,This is how the earth began to show its special qualities. Many people think that this was important for the beginning of life.,Harmful gases,It allowed the earth to dissolve harmful gases,
21、which had become part of the earths atmosphere, into the oceans and seas.,Possible life,That made it possible for life to begin to develop.,Small plants grow on the water,What scientists think is that the earth was different because of the arrival of small plants growing in the water on its surface.
22、,Oxygen,Nobody understood that these plants were the start of many changes.They multiplied and filled first oceans and seas with oxygen.,Shellfish and other fish appear,This encouraged the development of early shellfish and all sorts of fish.,Plants began to grow on dry land,Many millions of years l
23、ater the first green plants began to appear on land.,Carbon dioxide,Scientists believe that taking carbon dioxide from the atmosphere and filling the air with oxygen helped life to develop.,Insects appear,Later land animals appeared. Some were insects.,Amphibians appear,Others, called amphibians, we
24、re able to live on land as well as in the sea.,Reptiles appear,When the plants grew into forests, reptiles appeared for the first time. They produced young generally by laying eggs.,Dinosaurs appear,Later, some huge animals, called dinosaurs, developed. They laid eggs too. They became the most impor
25、tant animals on the earth for millions of years.,Mammals appear,But when they disappeared, mammals became more important. They were the last group of animals,Produce young,and they were different because they produced their young from within their bodies.,Finally about 2.6 million years ago some sma
26、ll clever Animals, now with hands and feet, appeared and spread all over the earth. Thus they have, in their turn, become the most important animals on the planet.,Greenhouse effect,But they are not taking care of the earth very well. They are putting too much carbon dioxide into the atmosphere, whi
27、ch prevents heat from escaping from the earth into space.,Too hot,As a result of this, many scientists believe the earth may become too hot too live on it .,future,So whether life will continue on the earth for million years to come will depend on whether this problem can be solved.,Text Retelling,T
28、he explosion of the earth produced_ _, which turned into water when the earth cooled down. Water allowed the earth to _ harmful gases into the oceans and seas. That made it possible for _ to begin to develop. The arrival of small _ encouraged the development of early _ and all sorts of fish. Many mi
29、llions of years later the first green plants began to appear on land.,water,vapour,dissolve,life,plants,shellfish,Later land animals appeared. Some were_. Others, called_, were able to live on land as well as in the sea. When the plants grew into forests, _appeared for the first time. Then _develope
30、d, which became the most important animals on the earth for millions of years. After they disappeared, _ became more important.,Text Retelling,insects,amphibians,reptiles,dinosaurs,mammals,They were the last group of animals and they were different because they _ their young from within their bodies
31、. Small clever animals, with hands and feet, _ and _ all over the earth. As time went by, they covered the earth and have become the most important animals on the planet.,Text Retelling,produced,appeared,spread,Discussion,What will our future be if the earth may become too hot for lives on it?,Destructive floods,Temperature gets higher , May cause fire in the forests,The last piece of ice for polar bears,Penguins become homeless,How to solve the problem of global warming?,Try our best to save our home,
