2019-2020学年人教版高中英语必修3（课件+课后限时作业+单元跟踪测评）Unit 4 Astronomy the science of the stars (共9份打包)

返回目录 　 Astronomy: the science of the stars Unit 4 返回目录 　 Astronomy Astronomy is the oldest science known to man.Thousands of years ago man looked at the stars and wondered about the heavens. But man was limited by what he could see with his eyes alone. 单元话题链接 返回目录 　 The Greeks studied astronomy over 2,000 years ago.They could see the size, color, and brightness of the stars. They could see their places in the sky. They watched the stars move as the seasons changed. But the Greeks had no tools to help them study the starry heavens. 返回目录 　 Each new tool added to the field of astronomy, and it helped man reach out into space.Until there were telescopes(望远镜), man knew little about the moon. They did not know that the planet called Saturn(土星) had rings around it. Their sight was so limited that they could not see all the planets.In the early 1700s, people thought there were only six planets. 返回目录 　 Before the spectroscope(分光镜) appeared, man did not know what kind of gases is in the sun or other stars. Without the radio telescope (射电望远镜) we did not know that radio noises come from far out in space. Today, astronomy is a growing science. We have learned more in the last fifty years than in the whole history of astronomy. 返回目录 　 Section Ⅰ　Warming Up and Reading 返回目录 　 目 录 Contents 课前教材预案 课堂深度拓展 课末随堂演练 返回目录 　 [课文理解] Ⅰ．Choose the best answer according to the text. 1．Why was life able to develop on the earth but not on other planets？　 A．The earth had a solid shape. B．The earth didn’t have harmful gases in its atmosphere. C．Water stayed on the earth but not on other planets. D．The earth was neither too hot nor too cold. 答案　C 课前教材预案 返回目录 　 2．Why are plants important on the earth? A．Because they produce oxygen for animals. B．Because they provide shade for animals. C．Because they provide a beautiful scene. D．Because they protect the soil from being destroyed. 答案　A 返回目录 　 3．What problem is caused by human beings? A．They exist everywhere on the earth. B．They cause globa