高一英语人教版第四单元 Unit 4 Astronomy the science of the stars（period 1）导学案第 1 课时，共 5 课时 班级 姓名 等级 【学习目标】1. The usage of words and phrases in this unit.2. To grasp the usage of noun clauses.【学习重、难点】 Grasp the usage of important phrases and structure s of this unit.【学法指导】Get the students to learn about how to instruct:Please look at/listen to... Please pay attention to...Please check that... You need...Make sure you... Don’t forget to...Watch out for... You’d better...【导入新知】1. What difference is there between the earth and other planets?2. Why is it wrong in films and stories to show dinosaurs and people together?3. How did the atmosphere on the earth appear? (within 8 words)【自主学习】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 did not have harmful gases in its atmosphere.C. The water stayed on the earth but not on the other planets.D.The earth was not too hot and not too cold.2. Why was it necessary for plants to grow before animals?A. Animals needed plants to protect them from the sun.B. Plants provided oxygen for animals to breathe.C. Animals could hide from hunters in the forest.D. It was easier for plants to grow.3. What is the main idea of the passage?A. The information of the earth.B. The arrival of humans and their inpact on the earth.C. The deveiopment of plants and animals on the earth.1D. The origin of life on the earth.【合作探究】Fill in the blanks according to the passage:Extremely small _______ first appeared on the surface of the water; and then green plants began to grow ______ ______. Later when the plants grew into forest, ______ appeared for the first time.【课堂小结】What is the correct order according to the text?① The clever animals with hands and feet appeared and spread all over the world.② The “Big Bang”.③ Small plants began to appear on the surface of the water.④ 65 million years ago, the age of the dinosaurs ended.A. ②①③④ B. ④③①② C. ②④③① D. ②③④①【达标检测】Ture or false questions.1. Human beings have known the origin of the earth clearly so far. ( )2. The appearance of water made it possible for plants and animals to live on the earth. ( )3. Plants first appeared on land and then in water. ( )4. Dinosaurs existed on the earth for over 140 thouands years. ( )5. It is human beings that are not looking after the earth very well and have caused global warming.2
