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1、课题Astronomy -How life began on the earth课时第15课时教案设计教学目标：1. to master the new words and expressions in the passage: astronomy, system, violent, harmful, exist, in time, give birth to, in ones turn, preventfrom2. to learn to talk about the science of the stars in English.3. to learn use some reading s
2、trategies such as guessing, key sentences, skimming, scanning and so on, so as to get the main idea and find some detail information of the text quickly.教学步骤：Step1. warming-upWhats your favorite subject? How about the subject of science? What does astronomy deal with?Astronomy is the scientific study of the universe and the heavenly bodies (such as the sun, the moon, and the stars) gas, and dust are in it.Step2. Pre-readingGet ss to discuss the questions on page 25 with their partners. Then ask students to tell their stories. Encourage them to tell different stories.2
