1、【学习目标】1. 掌握文章主旨大意，了解关于地球生命起源的相关知识。2. 反复阅读课文，掌握文中重难点词汇，短语3. 小组合作，共同分享学习成果。【课前预习】查找出下列词汇，短语1. solar system_ 2. 宇宙大爆炸_ 3. 十亿_4. 原子_ 5. theory_ 6. circle around_ 7. in all directions _ 8. 固体_ 9. globe _ 10. explode_ 11. religion_(adj.) 12. violent _ (n.)【课内探究】8Step 1 :1. How many planets circle around t
2、he sun? What are they? _ Step2: Reading(任务1) According to the time line, what happened?For several billion years after: _4.5 and 3.8 billion years ago:_ _ Many millions of years later: _140 million years: _ 65 million years ago:_ about 2.6 million years ago:_(任务2) ：认真读课文，读后连接各段主题大意Para 1 the importa
3、nce of water for life Para2 the development of planets and animals on the earthPara3 the formation of the earthPara4 a widely accepted theory about the formation of the universePara5 the arrival of humans and their impact on the earth(任务3)：Read the text again and then pay attention to some words and
4、 phrases.1天文学_ 2.系统，体制，制度_ 3.猛烈的_4.大气层，气氛_ 5.不同，不像_ 6. 有害的_7. 连锁，锁链_ 8.乘，增加_ 9. 存在_10 .因此，于是_ 11. 迷，难题_ 12.万有引力，重力_ 13.温和的_ 14.碰撞_ 15.拉，拖，牵引力_ 16 漂浮_【当堂检测】据句意及所给单词首字母或汉语意思完成下列句子.1. A _（天文学） is a scientific study of the sun, moon, stars, planets, ect.2. Christian, Buddhist and Hindu are the main r_(宗
5、教) in the world.3. The a_（气氛） over dinner was warm and friendly.4. The firework e_ （爆炸）in his hand.5. Its a _ (谜) to me why they didnt choose him.6 We must care about further _ (进展).7. As a parent, you should not _(鼓励) bad habits in a child.8. The ECP _ (出版) weekly.9. The force that attracts objects in space towards each other, and on the earth pulls them towards the center of the planet is called _ (重力)