1、Unit 5 Look into ScienceLesson 26 Keep the Candle Burning 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 opinions in
2、English.2. Analysis of Teaching Content来源:1ZXXK 教学目标Lesson 26 is the second 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 26 mainly talks about learn
3、 to do another experiment. 来源:学科网【知识目标】1. To master the words: match, light, burn, use up, candle holder, shallow, oxygen, one-fifth.2. To master the expressions: do an experiment, fillwith, coverwith, turnupside down, be (not) sure【能力目标】Improve the students ability of speaking, listening, reading a
4、nd 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.【教学难点】Write a composition to describe an interesting experiment. 课前准备 Tape recorder, Multimedia 教学过程来源:学,科,网Z,X,X,KStep 1. Warm-upFree talk: Think about it!1. Do you think science
5、is interesting? Why or why not?2. Name one or two famous Chinese scientists. What do you know about them?Step 2. Presentation1. Do an experiment.2. Show the picture and tell students the experiment: Keep the Candle Burning.3. Introduce something we need in the experiment, meanwhile learn the new wor
6、ds.4. Guess: What do we do the experiment?5. Read the text and fill in the blanks on page 69. Lets do the experiment together! Put the candle in the candle holder. Put the candle holder on the dish. Fill the dish half full with water. Light the candle with a_ or a lighter. What can you see? The cand
7、le is burning. _the candle burn for two or three minutes. Then carefully put the jar over it until the top of the jar rests on the dish. As the candle burns, it_ the oxygen in the air. When the candle stops_, it has used up all the oxygen in the air. The water inside the jar_ and fills about_ of the
8、 jar. This is because about one fifth of the air is made up of oxygen. 6. Check the answers.来源:学#科#网7. Guess: What is happening? Listen to the tape and answer the question.8. Listen and follow to the tape.9. Explain the expression of fractions:(1) 分数由分子和分母两部分构成。用英语表达时，分子用基数词，分母用序数词。(2) 如果分子为1，则分母的序数
9、词是单数形式，如果分子大于1，则分母的序数词用复数形式。来源:Z.xx.k.Com one (a) half 或 one second (one-second) = one (a)quarter 或 one-quarterStep 3. Practice1. Practice the text in groups.2. Finish the exercise on page 69.3. Retell the experiment.Step 4. Consolidation1. Group work: (Teacher asks students prepare something they n
10、eed in experiments in groups.)Do the experiment in groups. Read about the experiment in this lesson. With a group of classmates, practice the experiment. Do your experiment in front of the class. Dont forget the following things:(1) First, describe your experiment.(2) Second, ask the class what they think will happen.(3) Third, do the experiment.(4) Finally, ask the class if the result is what they expected.2. Show the experiments.3. Get a result.4. Write down the progress in the experiment.Step5 Homework1. Listen and read.2. Finish exercises of this lesson. 教学反思略。
