人教版高中英语必修三：Unit 4 Astronomy the science of the stars Warming up & Reading课件(35张）

(共35张PPT)
Unit 4
Astronomy:
the science of the stars(warming up&reading)
海王星
Neptune
['neptju:n]
水星
Mercury
['m :kjuri]水银
金星
Venus
['vin s]
地球
Earth
火星
Mars
木星
Jupiter
['d u:pit ]
土星
Saturn
['s t( )n]
天王星
Uranus
['ju r n s]
Cupid
The God of Love
Pre-reading
Do you know how our life began on the earth
Do you know any ancient idea about the beginning of the universe
Big Bang
HOW LIFE BEGAN ON THE EARTH
Reading
1. What is the original earth’s atmosphere made up of
2. What is the fundamental to the development of life
3. Which kind of life-being first appeared on the earth, plants or animals
4. Main idea of each paragraph
Task 1.Scanning
Scan the passage quickly to answer the following questions.
carbon, nitrogen, water vapour, and other gases
2. what is fundamental to the development of life
Water
1. What is the original earth’s atmosphere made up of
3. Which kind of life-being first appeared on the earth, plants or animals Why
At first, small plants began to appear on the surface of the water, they produce oxygen, which encouraged the later development of early shellfish and all sorts of fish.
4.Choose the main idea for each paragraph
( )The arrival of humans and their impact on the earth.
( )The formation of the earth.
( )The development of plants and animals on the earth.
( )A widely accepted theory about the formation of the universe.
( )The importance of water for life.
5
4
2
1
3
Task 2 Passage structure
Main body
Para 1:
Para 2:
Para 3:
Para 4:
Para 5:
A widely accepted theory about the formation of the universe.
The formation of the earth.
The importance of water for life.
The development of plants and animals on the earth.
The arrival of humans and their impact on the earth.
Read the passage carefully and analyse its structure:
The formation of the universe.
The development of life on the earth.
The development of human beings.
（ ）A. Insects and amphibians appeared.
（ ）B. Dinosaurs appeared.
（ ）C. The earth became a solid ball.
（ ）D. Small plants grew on the water.
（ ）E. Reptiles appeared.
（ ）F. Plants began to grow on dry land.
（ ）G. The earth was a cloud of dust.
（ ）H. Water appeared on the earth.
（ ）I. Shellfish and other fish appeared.
（ ）J. The universe began with a “Big Bang”.
（ ）K. Clever animals with hands and feet appeared.
（ ）L. Mammals apeared.
5
10
6
2
9
4
8
3
7
1
Task 3 Detailed reading
Put the order of development of life into a time line.
12
11
Task 4 Post reading
After reading the passage, discuss the following questions.
1. Why was the earth different from the other planets
2. Why is it wrong to show films with dinosaurs and people together
Because the water remained on the earth.
Because dinosaurs died out long before human beings developed on the earth.
Post reading
After reading the passage, discuss the following questions.
3. What problem is caused by human beings
Human beings causes global warming.
Lets review the evolution of life on the earth.
Task 5 Revision
Stage 1: The development of the earth
(1) After the Big Bang, what was the earth like
a cloud of dust
a solid globe
exploded with fire and rock
produced water
vapour and gases
(2) What happened next
(3) What did the water vapour and gases
form
the earth’s atmosphere
Water appeared
(4) What appeared as the earth cooled down
water is important for the beginning of life on the earth.
Why is water so important for the beginning of life
Because water allowed the earth to dissolve harmful gases into oceans and seas.
？
Stage2 The development of life
small plants appears in water
1.What life developed after water appeared
Shellfish and all sorts of fish
2.What life developed in water next
green plants began to grow on land
insects appeared
3.What about the life on land
amphibians on land and in the water
forests
4. What life developed next on land
reptiles appeared
dinosaur developed
5.What life developed after forests
appeared
mammals on land
6.What life developed after dinosaurs
small clever animals
7. What life developed after mammals
Because they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.
The earth may become too hot to live on .
We have only one earth!!!
As a student, what little things can we do for the earth
Discussion
solar energy
plant trees
recycle rubbish
prevent desertification
save water
purify air
Whether life will continue on the earth depends on human beings.
Only if we care will we help,
only if we help shall all be saved!
HOMEWORK:
1. Review and retell the passage winthin 10-15 sentences.
2. Underline the noun clauses in each paragraph.
Thank you!