Unit 14 Dinosaurs’Deaths 导学案

9年级英语（北京实验版）全册素材（含教案和练习）Unit 14 Dinosaurs’Deaths 一. 教学内容： Unit 14 Dinosaurs’ Deaths 二、教学目标 知识目标：熟练掌握本单元课文中的单词，短语和句型。 能力目标：培养学生的综合运用知识的能力。 三、教学难点： 培养学生的综合能力 四、本单元重点知识： 单词：要求大家掌握本单元单词表中的单词 （一）短语： 1. work on 从事 2. live on 以……为食，继续活着 3. have a close relation 有密切关系 4. lead to 导致…… 5. stop sb. from doing sth. 阻止某人做某事 6. more reasonable 更合理 7. make a study of… 对……进行研究 8. the cause of …. ……的起因 9. as a result 因此 10. at the same time 同时 （二）句型： 1. This hole was bel ieved to be caused by a large object that fell from space sixty—five million years ago. 人们认为这个坑是由6500万年前从外太空中陨落的巨大物体造成的。 2. Though it is prove d that this large object had a close relation with the death of dinosaurs and other animals, scientists have different opinions upon how the large object led to the death of the ancient animals. 尽管已证实这个巨大的物块和恐龙及其他动物的灭绝有密不可分的关系，但科学家们对这一物体如何导致这些远古动物的灭绝仍持有不同的意见。 五、本讲重点知识讲解： Dinosaurs are extinct now. Scientists are always wondering about the cause of their extinction. This proves to be difficult, but scientists are still working on it. It is reporte d that there is a huge hole in the ground in eastern Mexico. This hole was believed to be caused by a large object that fell from space sixty-five million years ago. At about the same time, dinosaurs living on the ground disappeared. Though it is proved that this large object had a close relation with the death of dinosaurs and other animals, scientists have different opinions upon how the large object led to the death of the ancient animals. 译文： 恐龙现在已经绝迹了。科学家们一直想搞清楚它们绝迹的原因。这不是一件容易的事情，但是科学家们依然在努力。 据说在墨西哥东部有个巨大的坑，人们认为 这个坑是由6500万年前从外太空中陨落的巨大物体造成的。在那时候，生活在陆地上的恐龙就绝迹了。因此，人们认为那个巨大的物体可能是导致恐龙死亡的原因。尽管已证实这个巨大的物体和恐龙及其他动物的灭绝有密不可分的关系，但科学家们对这一物体如何导致这些远古动物的灭绝仍持有不同的意见。 Twenty years ago, scientists discovered that a large cloud of dust was created by the crash of the large object. They reasoned that sunlight was stopped from reaching the earth by the cloud. As a result, the weather became very cold. The cold weather and less sunshine killed many plants which were the food of dinosaurs and other animals. Because of no food the animals soon died. 译文： 20年前，科学家们发现这个巨大的物 体与地面碰撞后会产生一个巨大的尘雾团，从而阻碍了太阳光照射地面。因此，天气变得非常冷。寒冷的天气和缺少阳光使很多植物死亡，而这些植物正是恐龙和其他生物赖以生存的食物。因为没有食物，这些动物很快就死亡了。 About ten years ago, w hen scientists from the United States and Mexico found that the large object caused a huge hole in Mexico, some scientists raised anothe ... ...