Unit 5 Look into Science.Lesson 25 Let’s Do an Experiment. 教案

Unit 5 Look into Science
Lesson 25 Let’s Do an Experiment
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 English.21世纪教育网版权所有
2. Analysis of Teaching Content
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 progress of the experiment, as well as teach the students how to do the experiments. 21教育网
【知识目标】
To master the words: science, experiment, fill, prove, scientific, method.
2. To master the expressions: do an experiment, fill…with, cover…with, turn…upside down, be (not) sure…【来源：21·世纪·教育·网】
【能力目标】
Improve the students’ ability of speaking, listening, reading and writing. Do and express the experiment.2-1-c-n-j-y
【情感目标】
Students can enjoy the pleasure of literature.
【教学重点】
The usage of prefer.
【教学难点】
Teach students love science.

Tape recorder, Multimedia
Step 1. Warm-up
Free talk:
Do you like science?
What kinds of experiments have you done in science class? 2·1·c·n·j·y
If you hold a jar that is filled with water upside down, what will happen?
Step 2. Presentation
Explain “upside down”.
Teacher show the picture about upside down.
Explain the new words with the pictures.
Listen to the tape and answer the questions:
What will Brain do?
Why does Danny say they should do this experiment outside?
Check the answers.
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。21·cn·jy·com
get wet意为“变湿”。后接形容词作表语。
pour out：“倒出，使流出，涌出”。　pour…into…：“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。　
“It is+形容词+enough to do sth.”“做某事是足够……的”。
=too…to…
=so…that…。
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。www.21-cn-jy.com
(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. Practice
Listen and follow to the tape.
2. Read the dialogue with the following questions.21·世纪*教育网
(1) Why does Danny say they should do this experiment outside?www-2-1-cnjy-com
(2) What will Brian do?
(3) Does Danny have the same theory as Brian’s?
3. Check the answers.
4. Read the lesson and answer the questions.
(1)Where does Danny think they should do the experiment?21*cnjy*com
(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?
What does Danny conclude?
Check the answers.
Read the experiment. Put the sentence in the correct order on page 67.21cnjy.com
Check the answers.
Step 4. Consolidation
Group work: Try to do the experiment in this lesson yourself.【来源：21cnj*y.co*m】
What happens when you use less water, more water, wet cardboard, or different kinds and sizes of jars?【出处：21教育名师】
Report your experiment and retell the process.
Summary the experiment. How to do an experiment.
Listen and sing a song, What is science.
Step5 Homework
1. Listen and read.
2. Finish exercises of this lesson.
略。