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1、Unit 5 Look into ScienceLesson 25 Lets Do an Experiment 来源:学优高考网 教材分析1. Analysis of the Students The students of Grade 9 have mastered certain vocabularies，expressions and structures. They also have the abilities of self-teaching and working in groups. Most of them are willing to express their opini
2、ons in English.2. Analysis of Teaching Content 教学目标Lesson 25 is the first lesson in Unit 5, Book 5.This unit focus on the subject Look into Science, also teach the students something about science. Students cares about the subject because it is close to everyone. Lesson 25 mainly talks about the pro
3、gress of the experiment, as well as teach the students how to do the experiments. 来源:学优高考网【知识目标】1. To master the words: science, experiment, fill, prove, scientific, method.2. To master the expressions: do an experiment, fillwith, coverwith, turnupside down, be (not) sure【能力目标】Improve the students a
4、bility of speaking, listening, reading and writing. Do and express the experiment.【情感目标】Students can enjoy the pleasure of literature.【教学重点】The usage of prefer.来源:gkstk.Com【教学难点】Teach students love science. 课前准备 Tape recorder, Multimedia 教学过程Step 1. Warm-upFree talk: (1) Do you like science?(2) What
5、 kinds of experiments have you done in science class? (3) If you hold a jar that is filled with water upside down, what will happen?Step 2. Presentation1. Explain “upside down”.来源:学优高考网 Teacher show the picture about upside down.2. Explain the new words with the pictures.3. Listen to the tape and an
6、swer the questions:(1) What will Brain do?(2) Why does Danny say they should do this experiment outside? 4. Check the answers.5. Language points.I think:“我认为”， 其后可接that引导的宾语从句。在使用时要注意，否定主句,反问从句。get wet意为“变湿”。后接形容词作表语。pour out：“倒出，使流出，涌出”。pourinto：“把倒进”。be sure of：“确信；对有把握”put on：“穿上”，为“动词+副词”构成的短语。“
7、It is+形容词+enough to do sth.”“做某事是足够的”。=tooto=sothat。conclude from意为“从推断，从中得出”。find, find out, discover, invent(1)find意为“找到，发现”，强调“找”的结果，也可指偶然发现、碰到，其后可接名词、复合结构或that从句。(2)find out指“弄清楚，查明”。着重表示通过调查、分析、思考等得出结果。(3)discover意为“发现”，指发现已存在但不为人所知的事物。(4)invent意为“发明”，指发明原来不存在的东西。Step 3. Practice1. Listen and f
8、ollow to the tape.2. Read the dialogue with the following questions.(1) Why does Danny say they should do this experiment outside?来源:gkstk.Com(2) What will Brian do?(3) Does Danny have the same theory as Brians? 3. Check the answers.4. Read the lesson and answer the questions.(1)Where does Danny thi
9、nk they should do the experiment?(2)What keeps the water in the jar?(3)Is Jenny sure of her theory? How do you know?(4)Why does Danny put on his raincoat?(5) What does Danny conclude?5. Check the answers.6. Read the experiment. Put the sentence in the correct order on page 67.7. Check the answers.St
10、ep 4. Consolidation1. Group work: Try to do the experiment in this lesson yourself.What happens when you use less water, more water, wet cardboard, or different kinds and sizes of jars?2. Report your experiment and retell the process.3. Summary the experiment. How to do an experiment.4. Listen and sing a song, What is science.Step5 Homework1. Listen and read.2. Finish exercises of this lesson. 教学反思略。
