1、Quiz,1.Who wrote “The Origin of Species ” (物種起源)? Newton Einstein Charles Darwin,2.How many planets are there in the Solar System? A 7 B 8 C 9,4. Which one belongs to reptile (爬行動(dòng)物）?,A. frog B. snake C. duck D. fishE. birdF. dog,3. Which one belongs to amphibian (兩棲動(dòng)物) ?,5. Which one belongs to mamm

2、al（哺乳動(dòng)物）?,A,B,F,6. Which gas is the most important for life? carbon dioxide (CO2 ) B. oxygen (O2) C. nitrogen (N2),Unit 4,reading: How life began on the earth,-by Chen Yongping,read the passage fast and match the main idea with each paragraph.,paregraph1 paregraph2 paregraph3 paregraph4 paregraph5,A

3、.The importance of water for life . B. the development of plants and animals. C.The formation of the earth D.A widely accepted theory about the formation of the universe . E.The arrival of humans and their impact on the earth.,D,C,A,B,E,Who knows how life began on the earth exactly? A. Scientists. B

4、. Astronomers. C. No one. D. Aliens (外星人). 2. What does “small clever animals” refer to? A. Insects. B. Reptiles. C. Dinosaurs. D. Humans.,3. The earth was different from the other planets is that_. A. a cloud of dust was around the earth B. comfortable climate remained on the earth C. water remaine

5、d on the earth D. carbon remained on the earth,4. The plants grew before the animals because they provide_. A. nutrients for animals to absorb(吸收) B. oxygen for animals to breathe C. necessary temperature for animals to keep warm D. water vapour for animals,careful reading,The explosion of the earth

6、 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 develop. The arrival of small _ encouraged the development of early _ and all sorts of fish. Many millions of years later, the first g

7、reen plants appeared on land. 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 _ developed, which became the most important animals on the earth for millions of years. A

8、fter they disappeared,_ became more important. They were different because they _ their young from their bodies. Small clever animals _ and _ all over the world. As time went by , they covered the earth and have become the most important animals on the planet.,water,vapour,dissolve,life,plants,shell

9、fish,insects,amphibians,reptiles,dinosaurs,mammals,produced,appeared,spread,1. Big Bang,How did the earth come into being?,大爆炸,一團(tuán)塵埃,一個(gè)固體球狀物,噴出烈火和巖漿,產(chǎn)生水汽，二氧化碳,冷卻,水出現(xiàn)了,有害氣體被溶解了,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. Pla

10、nts grew into _.,8. _ (on land),9. _ (on land),Have a try: Talking about the development of life,7. _ (on land),10. _ (small clever animals on land),Shellfish,Insects,water,plants,forests,Reptiles,Dinosaurs,Mammals,Human beings,advanced,plants,animals,many kinds,a few kinds,water,land,simple,complex

11、,達(dá)爾文 進(jìn)化論,Darwins theory of evolution,low,People are putting too much _ _(CO2) into the atmosphere.,carbon,dioxide,the earth may become too .,The result is that ,hot,global warming and green house effect.,It caused,ice in the North Pole-,water level -,The result is that ,rises .,melts .消融,How to protect the eart