Unit4 Astronomy: the science of the stars第 课时课题名称时间第 周 星期课型Words and expressions主备课人 目标1.Learn the useful words and expressions in this whole unit: astronomy system theory billion globe violent atmosphere unlike harmful chain multiply exist puzzle biology crash pull float mass solar system, in time, lay eggs, give birth to, in one’s turn, prevent…from, cheer up, now that, 2. Study the pronunciation of the key words. 3. Preview the whole unit.重点To get familiar with the pronunciation and meaning of the key words and expressions 二次备课难点How to distinguish the pronunciation and the key words自主学习学习方法指导:第一步:写出所给单词的音标;第二步:大声朗读三遍,注意画线字母的发音;第三步:依次写出画线字母的音标。从单词表找出下列词汇的音标,并熟读。注意画线字母的发音。依次写出上面单词画线字母的音标:system[ ] theory[ ]violent[ ]exist[ puzzle[ ]pull [ ]float[ ]gentle[ ]climate[ ]multiply[ ]chain[ ]globe[ ][ ][ ][ ][ ][ ][ ][ ][ ][ ][ ][ ][ ]问题生成记录: 精讲互动学习方法指导:第一步:从课本第 17 页到第 24 页找出下列字词的意义;第二步:在找出你所不会的字词或短语;第三步:小组讨论完成或向老师求助。Warming up1. 天文学 _____________2.行星_______________3.宇航员_____________4.宗教________________5.预测____________6. 系统______________1.太阳系______________2. 生命的起源___________3 在地球上______________Reading1 理论 ____________2 原子______________3.十亿______________4.地球______________5.猛烈的_____________6.碳______________7. 大气层____________8. 基础的___________9.酸______________10 链条_________________11 氧气_____________ 12.存在______________1. 以…开始___________2.及时__________3 和,又___________4.生产______________5.轮流______________6.阻止…做某事_________Using language111.太空船______________2.拉 _______________3 漂浮________________4.质量,团______...