Unit 4 Astronomy: the science of the stars(Period 1 Warming up and reading)
→step 7 homework1. learn the useful new words and expressions in this part by heart.2. read the reading passage again and try to talk about how life began on the earth in your own words.設(shè)計(jì)方案（二）→step 1 leading in the topicshow students a picture about solar system. let them match the names with the planets.→step 2 warming up each religion and culture has its own ideas about the origin of life on the earth. let students tell different stories that they know.→step 3 predicting by looking and discussing1. look at the pictures and title of the reading passage and discuss in pairs what the passage might be about.2. two or three students will give their opinions.3. let them read the passage quickly to see if they are right.→step 4 reading1. give students 3 minutes, and ask them to skim the passage to get the general idea for each paragraph and the passage.2. give students 5 minutes to read the passage carefully, and then answer the following questions.1) what was there on the earth before life began?2) why do scientists think there has never been life on the moon?3) why did animals first appear in the sea?4) why do green plants help life to develop?5) why were mammals different from other animals?3. give students 4 minutes to read the passage a third time. encourage them to try to deal with the language points in the context. give them some explanations if necessary.4. listening and reading aloudlet students listen to the tape. remind them to pay attention to the pronunciation of each new word and the pauses within each sentence. then ask them to read the text aloud to the tape.→step 5 extensionlet students think about and discuss the following questions.1. do you believe that there is life on other planets? why or why not?2. do you think it is possible that one day people will move their houses to other planets?→step 6 closing down1. have students get prepared in 3 minutes or so and then ask them to retell how life began on the earth.2. ask as many students as possible to have a try in front of the class.→step 8 homework1. go over the text and try to learn all the useful words and expressions in this part by heart.2. finish the exercises in comprehending on page 27.板書設(shè)計(jì)
unit 4 astronomy: the science of the stars
warming up and readinghow life began on the earthparagraph 1paragraph 2paragraph 3paragraph 4paragraph 5the passage
活動與探究suppose you are an expert who studies astronomy. you are invited to give a speech to the school students about the development of life on earth day (april 22).