Module 5 A Lesson in a Lab reading教学设计

外研版 Book1
Module5 A Lesson in a Lab
Reading and Vocabulary(教学设计)
Teaching Aims and Demands:
语 言 知 识 目 标：
词汇：exist expand elec ( http: / / www.21cnjy.com )tricity contract difference equipment metal heat burn react form substance add…to at the bottom at the top keep…out of make sure find out put in order think of react with
句型：1.It is +adj.+ for sb./ of sb. +to do sth..
2.Below is a description of a simple scientific experiment.
语言技能目标：
1.Encourage the stude ( http: / / www.21cnjy.com )nts to talk about science as well as science subject .
2.Help the students make sense of the two passages
3.Help the students to improve their reading ability
Step 1: Lead-in
Lead in the topic of this reading by daily talk
T: Now you learn seve ( http: / / www.21cnjy.com )ral subjects at school, such as, maths, Chinese, English， physics, chemistry and so on. Which do you like best Why Any volunteers
S1: I like En ( http: / / www.21cnjy.com )glish. My wish is to go abroad some day so I like English and I want to learn it well.
S2: I like biology. ( http: / / www.21cnjy.com ) I want to become a scientist to explore the secrets of life.
S3: I like physic ( http: / / www.21cnjy.com )s. I’m interested in electricity. I want to know more about it and make more use of it to make our life better and better.
S4:… ... ... ...
T: When I was at ( http: / / www.21cnjy.com ) your age, I often did experiments at school.(Teacher writes the word “experiment” on the blackboard.) Do you know the meaning of the word “experiment” It means “trial made in order to prove the truth of an idea”. For example, I hope to find the answer to this problem by experiment. Do you often do experiment
S5: Yes. We often do e ( http: / / www.21cnjy.com )xperiment in physics, chemistry and biology in the labs or in the classroom.
T: So today we are going to learn an experiment.
Step2: Pre-reading
Introduce some key new words
Show the foll ( http: / / www.21cnjy.com )owing new words from the text and ask the students to read them all together twice while correcting their pronunciation
dissolve el ( http: / / www.21cnjy.com )ectricity equipment oxygen react rust solid steam test tube
Work in pairs, and ( http: / / www.21cnjy.com )discuss why an iron knife and nail rust.( the students may say it’s because of water and oxygen.) How can you prove that
Step 3: Reading
Now, we’re going to ( http: / / www.21cnjy.com ) learn something about an experiment to make sense of the reason. Skim the text to get a general understanding
1.Fast reading: Read Passage A and choose the best title for it.
A. The Different Uses of Metals
B. The Reaction of Metals
C. The Reaction of Metals with Oxygen
( Key: B )
2.Careful reading: Read passage A again and answer these questions.
1.Which of the me ( http: / / www.21cnjy.com )tals in the table reacts the most with oxygen and water
( Key: Potassium )
2.What happens when you heat calcium in oxygen
( Key: It will burn to form an oxide )
3.Which metals react with steam
( Key: Magnesium, Aluminium and Zinc )
4.Does iron have a slow or fast reaction with steam
( Key: It reacts slowly.)
5.Does copper react with water
( Key: No )
Read passage B and fill in the table.(on page 44)
Step 4:Analyze the structure of the text.
Type of writing and ( http: / / www.21cnjy.com )summary of the text. Below is description of simple scientific experiment. It shows us how iron reacts with air and with water.
A Simple Scientific ( http: / / www.21cnjy.com ) Experiment Aim: To find out i ( http: / / www.21cnjy.com )f iron rusts (a) in dry air; (b) in water that has no air in it (air free water); (c)in ordinary water. Apparatus: clean iron nails; test tubes; test tube holder; cotton wool; oil; Bunsen burner. Iron in dry air method 1)Put ….at2) Push…down3) Leave ….for
result After one week, the nails have not rusted.
conclusion Iron does not rust in dry air
Iron in air-free water method 1) Half-fill… with2) Boil…for3) Put …. in 4) Add…to 5) Leave…for
result The nails do not rust in air-free water
conclusion Iron does not rust in air-free water
Iron in ordinary water method 1)Half-fill …with2)Leave …for.
result The nails rust in the tube with ordinary water
conclusion Iron rusts in ordinary water
Step 6: Reading ( http: / / www.21cnjy.com ) practice ( Give out reading practice to every student.)
Read the following ( http: / / www.21cnjy.com ) passage within 5 minutes and make a proper choice to each problem.
During the 19th c ( http: / / www.21cnjy.com )entury scientists found that when certain parts of the brain of a man were injured, he would lose the power to do something. And so people thought that each part of the brain did a different job. But modern research has found out that this is not so, for it is not easy to say exactly what each part of the brain does.
In the pas ( http: / / www.21cnjy.com )t fifty years, there has been a great increase in the amount of research done on the brain. Chemists and biologists have discovered that the way the brain works is not so simple as people in general may think. Chemists tell us that 1,000,000 chemical changes take place in the brain every second. Some recent researches also suggest that we can remember everything that happens to us. We may not be able to recall the things we’ve heard and seen, but it is all kept there in the storehouse of the mind.
Earlier scienti ( http: / / www.21cnjy.com )sts thought that the power of one’s brain got weaker and weaker as one grew older. But it is now thought that it is not true. As long as the brain is given plenty of exercise, it keeps its power.*It has been established that an old person who has always been active in the mind has a quicker mind than a young man, who has done some physical work without using much of his brain.* The more work we give our brains, the more work they are able to do.
1. At present, the scientists have found out that___.
A. a certain part of a man’s brain does a certain job
B. if a man’s brain is injured, he can’t do anything
C. it’s diffic ( http: / / www.21cnjy.com )ult to conclude what each part of a man’s brain does
D. the brain is ( http: / / www.21cnjy.com ) more powerful than any other parts of a man’s body
2. Which of the following is TRUE according to the text
A. Less researches ( http: / / www.21cnjy.com ) have been done on the brain in the past fifty years.
B. Most people think that the way the brain works is simple.
C. 1,000,000 c ( http: / / www.21cnjy.com )hemical changes take place in the brain every minute.
D. We can’t rec ( http: / / www.21cnjy.com )all all that we’ve heard and seen because what we can remember is limited.
3. The main idea of the last paragraph is that____.
A. One’s brain gets weaker and weaker as he grows older
B. One’s brain grows stronger as he grows older
C. One’s mind becomes quicker as he keeps active in thinking
D. We’d better d ( http: / / www.21cnjy.com )o less physical work, for it is not good for our mental health
4. The purpose of writing this text is to ____.
A. tell us some new findings about man
B. criticize the scientists of the 19th century
C. encourage further study in the brain
D. correct some misunderstanding about the brain
Key: CBCD
Step 5: Homework
1. Conduct an experiment about something you see in your daily life.
2. Try to repeat the text freely yourself.
3. Learn the new words again, using the dictionary If necessary.