《上学期unit4Astronmy-PPT课件.ppt》由会员分享,可在线阅读,更多相关《上学期unit4Astronmy-PPT课件.ppt(16页珍藏版)》请在金锄头文库上搜索。
1、List the subjects that youre learning now in your curriculum (课程课程)Chinese EnglishMathematicsChemistryPhysicsGeographyHistoryPolitics Is there any relationship between each subject andothers? _ the scientific study of treatment of diseases and injuries. _ the study of the chemistry of living things.
2、 _ the scientific study of the earths atmosphere, oceans and climate. _ the scientific study of objects in space, such as planets, stars, comets(彗星) and “black holes”.biochemistry geophysics medicine astronomyastronomybiochemistrygeophysicsmedicineAstronomy: the science of the stars How much do you
3、know about the universe? the Milky Waythe universethe universethe Milky Waysolar systemthe earthis made up of the sun and the objects that orbit it. Nine planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Pangu separates the sky from the earth造人造人Nuwa makes men How did
4、 the universe begin?HOW LIFE BEGAN ON THE EARTHNew words and expressions:l lviolent: (adj.) strong or severe violent: (adj.) strong or severe 猛烈的猛烈的猛烈的猛烈的 (n.) violence(n.) violencel lsolid: (adj.) without holes; strong and firmsolid: (adj.) without holes; strong and firm实心的,固体的实心的,固体的实心的,固体的实心的,固体的
5、l lexplode: (explode: (vtvt. & vi.) burst with a loud noise; blow up . & vi.) burst with a loud noise; blow up 爆炸,爆发爆炸,爆发爆炸,爆发爆炸,爆发 (n.) explosion(n.) explosionl lin time: not late in time: not late 及时及时及时及时 (here) eventually (here) eventually 最终最终最终最终l lwater water vapourvapour carbon dioxide (COca
6、rbon dioxide (CO2 2) ) oxygen nitrogenoxygen nitrogenl latmosphere (n.) atmosphere (n.) 大气层;气氛大气层;气氛大气层;气氛大气层;气氛l ldissolve: become liquid dissolve: become liquid 溶解溶解溶解溶解l lharmful: causing harm harmful: causing harm 有害的有害的有害的有害的l lmultiply: (v.) produce large numbers of offspring multiply: (v.) pr
7、oduce large numbers of offspring 繁殖繁殖繁殖繁殖l lamphibian reptile mammal amphibian reptile mammal l lspread : (spread : (vtvt. & vi.) (spread, spread) . & vi.) (spread, spread) 伸展,展开,传播伸展,展开,传播伸展,展开,传播伸展,展开,传播l lmethod: waymethod: wayl lprevent.from: stopfromprevent.from: stopfroml ldepend on: be decide
8、d by depend on: be decided by sthsth.; follow from .; follow from sthsth. . 视某事物而定;取决于某事物视某事物而定;取决于某事物视某事物而定;取决于某事物视某事物而定;取决于某事物两栖动物两栖动物爬行动物爬行动物哺乳动物哺乳动物Task 1Think about what you have read and make choices.1.Why was the earth different from other plants?2.A. It produced a lot of heat. B. The water r
9、emained.3.C. Water disappeared. D. It was the oldest planet.4.2. Why was life able to develop on the earth but not on 5. 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 w
10、as not too hot and not too cold.3. Why was it necessary for planets 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 caus
11、ed by human beings?A. They exist everywhere on the earth. B. They caused global warming. C. They find new methods of growing crops. D. They enjoy hunting and fishing.Para.1: What was there on the earth before life could begin?1)How did come into being on the earth?2)Whats the importance of the prese
12、nce of water on the earth?The explosion of the earth produced water vapour, which turned into water when the earth cooled down.It allowed the earth to dissolve harmful gases into oceans and seas, which made it possible for life to begin to develop.Task 2waterScanningRead Para 1. and find out how the
13、 earth came into being.a cloud of energetic dustBig Banga ballslowly combinethe earth cooled downit exploded and produced kinds of gaseswaterthe earths atmosphereScanningRead Para 1. and find out how the earth came into being.a cloud of energetic dustBig Banga ballslowly combinethe earth cooled down
14、it exploded and produced kinds of gaseswaterthe earths atmospherePara.2-4: Development of Lifesmall plants in watershellfish and all sorts of fishgreen plants on landforestsinsects (on land)amphibian (on land and in water)reptiles (on land)dinosaurs (on land)mammals (on land)12364、57、8、9animalsplants Task 31.What do you think of the last two sentences in the last paragraph?2.Is the earth getting warmer each year? Can you feel it?3. What will global warming bring to us? Give examples. How can human solve “this problem”?