1. 张宝 盘山县高中

2. The Solar system eight planets

3. Water Air Life ? The differences between the earth and the other planets

4. Main body para 1: para 2: para 3: para 4: para 5: A widely accepted ______ about the formation of the universeformation The formation of the_____formation The importance of ______forimportance life The development of _______ _ ____________on the earthdevelopment The arrival of _________andarrival their impact on the earthearththeoryearth waterplantsanimals humans

5. The Big Bang

6. Do you know some other ideas about the beginning of the universe besides “Big Bang”?

7. How did the earth form? A cloud of dust A solid ball fire and rock Atmosphere carbon nitrogen vapour other gases

8. It was full of water on the earth

9. Fill in the blanks Water had also appeared on other planets like_______but, unlike the earth, it had disppeared later. It was not immediately obvious that water was to be _________to the development of life. What scientists believe is that the continued ______ of water allowed the earth to dissovle __________ and _________ into the oceans and seas. This produced a______________, which made it possible for _____to develop. Mars fundamental presence harmful gases acids a chain reaction life

10. The development of life

11. Put the order of development of life into a timeline. 1.insects and amphibians appear 2.reptiles appear 3.shellfish and other fish appear 4.dinosaurs appear 5.small plants grow on the water 6.plants begin to grow on dry land 7.mammals (including humans )appear 5 3 6 1 2 4 7

12. Para5: What problem is caused by human beings? Global warming

13. Big Bang The earth water Plants in the water Shellfish and fish Insects and amphibians Reptiles Dinosaurs Mammals human beings Retell the passage

14. If you are the officers of the protecting environment organization,what measures should you take to prevent the earth from becoming hot? Discussion:

15. Surf the Internet to find more information about Astronomy

16. 1 why was the earth different from other planets? A It produced a lot of heat B The water remained C Water disappeared D It was the oldest planet 2 Why was life able to develop on the earth but not on other planets? A The earth had a solid shape B The earth did not have harmful gases in its atmosphere C The water stayed on the earth but not on other planets D The earth was not too hot but not too cold Choose the best answer B C

17. 3 Why was it necessary for plants to grow before animals? 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 forests. D It was easier for plants to grow. 4 What problem is caused by human being? A They exist everywhere on the earth B They cause global warming C They find new methods of growing crops D They enjoy hunting and fishingB B

18. Thank you very much Good bye!