人教版高中英语必修三《Unit 4 Astronomythe science of the stars》教学设计

Unit 4 Astronomy: the science of the stars
Learning aims:
1.Enable Ss to talk about the science of the stars, the development of life;
2.Enable Ss to learn how to talk about the beginning of life on the earth;
3.Foster the Ss’ interests of science and lead the Ss to study scientifically.
Period 1 Warming up:
1. Let’s appreciate some beautiful pictures and videos of the solar system.
2.Talk about universe and solar system.
What are the names of the eight planets that circle our sun?
_____________________________________________________________________ 3.The beginning of the universe
Do you know each religion or culture has its own ideas about the beginning of the universe? Please give an example if you know.
a. Chinese Legends: _____________creates the world ; _______makes human beings
b. In Bible, the world and the whole universe was created by the_________
c. Science: ______________, a widely accepted theory.
Period 2 Reading
Task 1 Listen and match
Listen to the tape of the reading passage and match the main idea of each paragraph. Para 1 a.The importance of water for life
Para 2 b. The development of plants and animals on the earth
Para 3 c. The formation of the earth
Para 4 d. The arrival of humans and their impact on the earth
Para 5 e. A widely accepted theory about the formation of the universe
Task 2 Scanning
Work in pairs. Get familiar with the order of development of life according to the passage.
The evolution of life on the earth.
Stage 1: The development of the earth
Stage 2: The development of life in water
↓
Stage 3: The development of life on land
↓
Stage 4: The development of humans
↓
The development of life
Task 3 Careful reading
1.Stage 1: The development of the earth(para1—3)
The Big B ang→ a cloud of_________→ a violent_______________→exploded with___________________→produced water vapour and gases→_______________（cool down）→____________ appeared→life begin
2. Stage 2: The development of life in water
First:extremely small plants→early___________ and all sorts of______
3.Stage 3: The development of life on land
Next: ___________________ on lands→followed by ______________ (some insects and other amphibians) →later green plants grew into _____________→______________ appeared for the first time→some huge animals called_________developed→When dinosaurs disappeared, _________________ became more important
4. Stage 4: The development of humans
Finally: small clever animals→_________came into being and spread all over the
world.
Task 4 Summary How did life begin on the earth?
Big Bang
carbon nitrogen water vapour other_________
↓
human beings
Period 3 Discussion:
As a student, what little things can we do for the earth?
to prevent the earth from getting hotter and hotter
to slow down the problem getting worse
……
……
Period 4 Assignment (homework) :
1.Read aloud the reading passage and underline the useful phrases and sentence patterns.
2.Finish the exercises of learning about language part.。