人教高中英语必修3Unit4 Astronomy: the science of the stars Warming up 课件（共19张PPT）

(共19张PPT)
Unit 4 Astronomy: the science of the stars
Do you know how life began on earth is explained in different religions and cultures? Give some examples, please.

Warming up
Pangu separates the sky from the earth

Nuwa makes human being from the clay(粘土).
God created the world in seven days
Bible

Brahman (婆罗门) is the creator of the universe and all living beings are said to have evolved（进化） from him.
India
All of those legends（传说） about the beginning of universe.
Q:What is the scientific theory about the
beginning of life on the earth?
That is the topic we are going to
talk about. Follow me, We will get it.
Teaching Aim
Target Aims:
1. To learn some knowledge about the evolution of life on the earth
2. To master and use vocabulary related to the universe.
Ability Aims:
1. To train the students’ ability to looking for integration of the information;
2. To cultivate students’ ability of induction and summary;
3. To cultivate students’ ability to use knowledge to solve practical problems.
Emotion Aims:
1.To realize the importance of cooperation in work and study and train their consciousness of cooperation and exploring spirit;
2.To realize the importance of the earth, adjust and improve their thought about how to protect the earth and make it a better place to live on.
Key points :
1. Let the students?to recognize the important?effect of?protecting the earth;
2.To cultivate students’ ability of grasping the whole structure of the article and the ability to quickly learn?the article?details.
Difficult Points:
1. How to cultivate students' ability of organization output language;
2. How to protect the earth and make it a better place to live on, improve the level of reading comprehension and language.
Read the text quickly and match the main idea for each paragraph.
Task 1: Fast reading
Para. 1 The formation(形成) of the
earth.
Para. 2 The importance of water for
life.
Para. 3 A widely accepted theory
about the formation of the
universe（宇宙）.
Para. 4 The arrival of humans and
their impact on the earth.
Para. 5 The development of plants
and animals on the earth.
Big Bang
A solid ball
Atmosphere
The earth
Amphibians（两栖动物）
Reptiles(爬行动物)
Dinosaurs
Mammals（哺乳动物）
Man had evolved from apes.
Work in pairs:

Put the order of development of life into a timeline . Use the reading passage to help.
Task 2: Careful reading
10
7
3
8
4
9
6
1
5
2
12
11
1. Insects and amphibians appeared.
3. The earth became a solid ball.
5. Reptiles appeared.
7. The earth was a cloud of dust.
9. Shellfish and other fish appeared.
11. Clever animals with hands and feet appeared.
2. Dinosaurs appeared.
4. Small plants grew on the water.
6. Plants began to grow on dry land.
8. Water appeared on the earth.
10. The universe began with a "Big Bang".
12. Mammals appeared.
True (T) or False (F).
1. The earth appeared before the Big Bang happened.
2. The main difference between the earth and other planets is that there is water on the earth.
3. Life began in water and then on land. 4. Human beings produce too much carbon dioxide which causes the global warming on the earth.
5. According to the text, human beings would disappear in the end.
F
T
T
T
T
A cloud of dust → a solid ball → presence of water → on the water → shellfish & other fish → plants begin to grow on dry land → insects and amphibians appear → retiles appear → dinosaurs appear → mammals appear
The development of life:
insects and amphibians appear
reptiles appear
dinosaurs appear
mammals appear
Summary
Homework:
Shorten the passage in the order of time with 120 words or so.
Thank you very much.
Good bye!