高二英语Astronomy教案

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Unit 4 Astronomy: The Science Of The Stars

Teaching aims:

1. Enable students to improve their listening skills and reading ability.

2. Enable students to understand the development of gravity and how gravity affects us in different times and places.

3. Arouse students’ interest to search for the mystery of space.

Emphasis:

1. Words and expressions: gravity, float, cheer up, now that, break out, etc

2. Astronomic knowledge like gravity and black hole.

Difficulties:

1. Help the students to understand the development of gravity.

2. Help the students to know how gravity influences us.

Teaching methods: skimming, scanning, discussing.

Teaching aids: a tape recorder, a projector and a computer.

Teaching procedures:

The first period reading

Step I Presentation

T: Hello, everyone! Today we’ll come to Unit 4 Astronomy. Before that I have a question: Where do we come from? Or we can say: Who are our ancestors?

S1: Monkeys!

S2: Beijing Ren who lived many years ago.

S3: Reptiles.

S4: Mammals.

S5: Amphibians.

S6: Dinosaurs.

T: Very good! Can you put them in right order?

S7: Amphibians, Reptiles, Dinosaurs, Mammals, Beijing Ren.

T: Do you know what it was like before life appeared on earth?

S8: It was full of water, perhaps.

T: Before that, what was it like?

S9: Sorry, I don’t know.

T: Do you want to get more information? Today we’ll learn something about How Life Began on the Earth. Turn to Page 25. Let’s come to Warming up first.

Step II Warming up

1. Read the three questions, while the students listen and follow.

2. Give the Ss several minutes to discuss the questions.

3. Collect answers from the whole class.

4. Check the answers while discussing.

T: I’ll read the three questions for you. You should listen to me carefully. (If students don’t know how to discuss, show them an example.) For example, medicine. When someone gets serious illness, he will go to the hospital. The doctor will examine him. He will take his temperature, measure his blood pressure and give him an X-ray, or a CT. For the whole process of the examination, what kind of science has been used?

S1: Biology.

S2: Chemistry.

T: So we can say medicine combines biology and chemistry. What about biochemistry and geophysics?

S3: I think biochemistry combines biology and chemistry.

S4: Geophysics combines geology and physics.

T: What about astronomy?

S5: Physics.

S6: Mathematics.

T: Very good. We should know that astronomy is a multidisciplinary subject and if we want to do some research on it, we should know many science subjects related to it. Now discuss the second question:

What do we mean when we say we are studying a subject scientifically? Or what’s the correct attitude towards science?

S7: We should be objective, not superstitious.

T: What’s the correct way to prove a scientific idea?

S8: We should design experiments to test it for several times.

S9: Then we can analyze the results and draw a conclusion at last.

T: Let’s sum up the answers. To study a subject scientifically, we must try to be objective. In order to test our idea, we should design experiments, then analyze the results and draw a conclusion. Now let’s talk about the third question.

What are the most important skills we need to be real scientists?

S10: We should be very careful.

S11: Be objective and logical.

S12: We should be wise enough to design an experiment and write the reports clearly.

S13: We should be able to draw conclusions from the experiments and not impose conclusions on the data.

T: I think you have done great work. From the discussion we know that it’s not easy to be a scientist. So you should work harder if you want to be a scientist.

Step Ⅲ Pre-reading

Get the Ss to discuss the questions on Page 25 with their partners. Then ask the Ss to tell their stories. Encourage the Ss to tell different stories. If they don’t know any, tell them some.

T: Now please look at the slide show. And discuss these questions with your partners. Then I’ll ask some students to tell us their stories. Are you clear?

Ss: Yes, Sir/Madam.

1. Do you know each religion or culture has its own ideas about the beginning of the universe? Please give an example if you know.

2. Do you know what a scientific idea is?

After the Ss’ discussion, teacher says the following.

T: Now who’d like to tell us a story? Volunteer!

S1: Let me try. In China, we all know that Pangu separates the sky from the earth.

T: Can you describe the story in details?

S1: Sorry, I can’t remember clearly.

T: Who can? Nobody? Now I’ll tell you. Look at the screen.

Step Ⅳ Reading

Scanning

Get the Ss to read the passage quickly and accurately and meanwhile help the Ss to form a good habit of reading. Teacher gives the Ss a couple of minutes to look through the whole passage. Tell the Ss to read the text silently and then ask some detailed questions about the text on the slide show with their partners. Teacher should encourage the Ss to express their ideas.

T: We’re going to learn a passage about how life began on the earth. Now let’s look at the slide show. Read the text quickly and find answers to the following questions.

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