人教版必修3Unit4Astronomy：thescienceofthestarsAstronomyPPT

1、Astronomy: the science of the stars,Unit 4,_ the scientific study of treatment of diseases and injuries. _ the study of the chemistry of living things. _ the scientific study of the earths atmosphere, oceans and climate. _ the scientific study of objects in space, such as planets, stars, comets and

2、“black holes”.,Astronomy, solar system, planet, now that ,now that,solar system,planet,astronomy,Have a try,The Solar system,eight planets many comets other objects,Solar system,金星,火星,木星,冥王星,海王星,天王星,土星,水星,The sun太阳,How life began on the earth?,fire and rock,evolution of life on the earth,Pangu separ

3、ates the sky from the earth,Other legends about the beginning of universe,Nuwa makes human beings,The Big Bang,Join the main idea for each paragraph,Para.1 D. The development of plants and animals on th earth Para.2 E. The arrival of humans and their impact on the earth Para.3 C. The importance of w

4、ater for life Para.4 A. A widely accepted thoery about the formation of the universe Para.5 B. The formation of the earth,Choose the correct answers,1.Why was the earth differrent from the other planets ? AIt produced a lot of heat BThe water remained CWater disappeared DIt was the oldest planet 2.W

5、hy did the plants grow before the animals came ? AAnimals needed plants to protect them from the sun BPlants provided oxygen for animals to breathe CAnimals could hide from hunters in forests DIt was easier for plants to grow 3.What problem is caused by human beings ? AThey exist everywhere on the e

6、arth BThey cause global warming CThey find new methods of growing crops DThey enjoy hunting and fishing,Read paragraph 2 to 4 carefully and finish the following form,1. small plants in water,2. shellfish and all sorts of fish,3. green plants on land,4. insects(on land) 5. amphibians (on land and in water),6. forests,7. reptiles(on land) 8. dinosaurs(on land) 9. mammals(on land),10. small clever animals with hands and feet,11. human,How life began on the earth,electric bike