高中英语必修三 (课件)Unit 4 SPACE EXPLORATION Listening and Speaking

1、Listening and Speaking思维激活从网络上搜索歌曲，根据所听内容，在下面歌词空格处填入正确的单词。The Bing Bang Theory ThemeOur whole universe was in a hot dense stateThen nearly fourteen billion years ago expansion startedWait.The Earth began to coolThe autotrophs began to droolNeanderthals developed toolsWe built a wall (we built the py

2、ramids)Math, science, history, unraveling the mysteriesThat all started with the big bang“Since the dawn of man” is really not that longAs every galaxy was formed in less time than it takes to sing this songA fraction of a second and the elements were madeThe bipeds _The dinosaurs all met their fate

3、They tried to leap but they were lateAnd they all died (they froze their asses off)stood up straight The oceans and pangeaSee ya, wouldnt wanna be yaSet in motion by the same big bang!It all started with the big BANG!Its expanding ever _ but one dayIt will cause the stars to go the other wayCollapsi

4、ng ever inward, we wont be here, it wont be hurtOur best and brightest figure that itll make an even bigger bang!Australopithecus would really have been sick of usoutward Debating out while here theyre catching deer (were catching viruses)Religion or _， Encarta, DeuteronomyIt all started with the bi

5、g bang! Music and mythology, Einstein and astrologyIt all started with the big bang!It all started with the big BANG！astronomy 在网上查阅一些资料后用英语向你的同学介绍一下太阳。_话题延伸Example：The Suns Energy The sun, our singular source of renewable energy, sits at the center of the solar system and gives out energy at an ext

6、remely large and relatively constant rate, 24 hours per day, more than 360 days of the year. If we could harvest the energy coming from just 10 hectares (25 acres) of the surface of the sun, we would have enough to supply the current energy demand of the world. However, there are three important rea

7、sons why this cannot be done. First, the earth is displaced from the sun, and since the suns energy spreads out like light from a candle, only a small amount of the energy leaving an area of the sun reaches an equal area on the earth. Second, the earth turns about its polar axis (极轴), so that any co

8、llection device located on the earths surface can receive the suns energy for only about one half of each day. The third and least factor is the condition of the thin shell of atmosphere that surrounds the earths surface. At best the earths atmosphere accounts for another 30 percent reduction in the

9、 suns energy. As is widely known, however, the weather conditions can stop all but a minimal amount of solar radiation from reaching the earths surface for many days in a row.2.课外阅读 We find that the moon is about 239,000 miles (384,551 km) away from the earth, and, to within a few thousand miles, it

10、s distance always remains the same. Yet a very little observation shows that the moon is not standing till. Its distance from the earth remains the same, but its direction continually changes. We find that it is traveling in a circleor very nearly a circleround the earth, going completely round once

11、 a month, or, more exactly, once every 27 and 1/3 days. It is our nearest neighbor in space, and like ourselves it is kept tied to the earth by the earths gravitational pull. Except for the sun, the moon looks the biggest object in the sky. Actually it is one of the smallest, and only looks big beca

12、use it is so near to us. Its diameter is only 2,160 miles (3,476 km), or a little more than a quarter of the diameter of the earth. Once a month, or, more exactly, once every 29 and 1/2 days, at the time we call “full moon”， its whole disc looks bright. At other times only part of it appears bright,

13、 and we always find that this is the part which faces towards the sun, while the part facing away from the sun appears dark. Artists could make their pictures better if they kept this in mindonly those parts of the moon which are lighted up by the sun are bright. This shows that the moon gives no li

14、ght of its own. It merely reflects the light of the sun, like a huge mirror hung in the sky. 我们发现月球距离地球大约239 000英里（384 551公里），在几千英里范围内，它的距离始终保持不变。然而，很小（角度）的观察表明，月球并不是静止的。它与地球的距离保持不变，但它的方向不断变化。我们发现它绕着地球转圈，或者几乎是一个圆，一圈转一月，或者更确切地说，一圈27又1/3天。它是我们在太空中最近的邻居，和我们一样，它被地球的引力束缚在地球上。 除了太阳，月亮看起来是天空中最大的物体。实际上它是最小的，看起来很大是因为它离我们太近了。它的直径只有2 160英里（3 476公里），也就是地球直径的四分之一多一点。 一个月一次，或者更确切地说，每29.5天一次，在我们称之为“满月”的时候，它的整个圆盘看起来很亮。在其他时候，只有一部分