Unit 4 Astronomy: the science of the stars课件

课件19张PPT。Galaxy(星系) Solar SystemMarsUranusNeptuneJupiterEarthVenusMercurySaturnSolar System水星金星地球火星木星土星天王星海王星冥王星Nu WaPan GuGod created the world and the human beings in seven days.Day 1: God spoke and separated light from darkness, creating Day and Night.Day 2: God spoke and separated the water creating sky and ocean.Day 3: God spoke and created dry land.Day 4: God spoke and created the sun, the moon and stars.Day 5: God spoke and created living things in the air and sea.Day 6: God spoke and created the land animals and the first man.Day 7: God rested and called this day Holy.Life came from a comet(彗星) that hit the earth.Skimming: What did the universe begin with? When did water begin to appear on the earth? How long did the dinosaurs exist on the earth?Paragraph 1: Paragraph 2: Paragraph 3: Paragraph 4: Paragraph 5: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.The arrival of clever animals and the problem caused by them to the earth.Main IdeaDeveloping Linethe formation of _____the formation of _____the appearance of _____the arrival of _____their _____ on the earththe universethe earthplants & animalswatereffectDevelopment of the living environmentDevelopment of living things⑧ extremely small plants④ shellfish and other fish① green plants on land⑤ insects and amphibians⑥ reptiles③ dinosaurs② mammals⑦ clever animals with hands and feet③ a cloud of dust② a solid globe①atmosphere④ water③②①④⑧④①⑤⑦③②⑥Answer questions: What happened after the “Big Bang”? 2. Why do we say that the earth was violent then? 3. What made the earth’s atmosphere? 4. Why was the earth different from other planets? 5. Why were the extremely small plants important to the development of early life? 6. Why is it wrong to show films with dinosaurs and people together? 7. What problem is caused by human beings?ConsolidationAccording to a widely accepted _____, the universe began with a _____ that threw matter in all _____. Several _____ years after it, the earth was still a cloud of ____. Then it became a solid _____. It was very _____. _____, nitrogen, water _____ and other gases made the _____. Water appeared which was _____ to the development of life and allowed the earth to _____ harmful gases and _____ into the oceans and seas. Millions of years later, plants and animals appeared. _____ could lay eggs and _____ could produce milk to feed babies. Finally, some small _____ animals came into being. However, they are putting too much _____ into the atmosphere, which throws the future of life into uncertainty.theory“Big Bang”directionsbilliondustglobeviolentCarbonvapouratmospherefundamentaldissolveacidsReptilesmammalscarbon dioxidecleverGroup Work 1. Why did the plants grow before the animals came? 2. Why did water stay on the earth but not on the other planets? 3. Why did some life forms disappear? 4 ... ...