牛津译林版（2019）高中英语选修第一册 Unit1 Reading 精品课件2(共21张PPT)

(共21张PPT)
The ocean deep
The ocean covers around 71% of the surface of our planet.
underwater volcanoes
the blue whale
a 65,000-kilometre-long mountain range beneath the ocean, which is the world’s longest.
Human’s imagination and exploration
Deliver a speech
The ocean deep
If you were to write an article about the world beneath the ocean and deliver a speech,
what other information would you include
P4 A3
content

What’s actually being talked in your writing
submarine g_____
need ________
exploration
m life
purpose/aim/target
eology
arine
Main Body
C_______

onclusion
I_______
ntroduction
Read the documentary transcript and complete the chart below with the main idea of each paragraph.
P4
A1
Learn about the writing technique of describing something in spatial order.
The documentary transcript describes the ocean in the surface-to-bottom order, which makes its content more organized and easier to follow. Find the expressions indicating the changes in position.
P5
B2
Check your answer:
the open ocean
(200m)
the twilight zone
(200~1000m)
the deep ocean
(past 1000m)
Read for strucutre
Read the documentary transcript and complete the chart below
Para. 3:
Para. 2:
Para. 4:
Para. 5:
Para. 1: We should explore the world beneath the ocean for new life forms and unusual geological formations.
Introduction
Main body
Conclusion
Much of the known marine life lives in the open ocean, and small filter feeders and hunters live in the twilight zone.
The deep ocean is home to the strangest creatures on the Earth.
Shrimps and other organisms live around
hydrothermal vents, and the Mariana Trench can be found on the ocean floor.
More wonders beneath the surface of the ocean await us.
Task 5
Think and share.
At the end of the first paragraph, a question is asked, and at the end of the last paragraph, another question is asked.
What is the author’s purpose of writing in this way
Para. 1
Para. 5
To attract the readers
To call on the readers to explore
fascinating
challenging
vast
mysterious
Zones Depths Environment Life forms or
geological formations
The open ocean
The twilight zone Little sunlight ● Almost no plant life
● Small filter feeders
● ______________________
The deep ocean ● No light ● ____________ _______________ ● Huge pressures ● Blind, strange organisms, and some having male and female organs
● Shrimps and other organisms
●
Task 4
Complete the following table.
1,000 metres to the ocean floor
Hunters with telescopic, upward-pointing eyes and backward-curving teeth
0 to 200 metres
Most visible light
200 metres to 1,000 metres
Much of the known marine life
Temperatures just above freezing
Hydrothermal vents, the Mariana Trench and rock bridges
Check your answers:
2. If you were to write an article about the world beneath the ocean, what other information would you include
P4
A3-3
Group
Presentation
Deliver a speech
Advantages
Marine plants
Challenges/Threats
Measures
Adavantges
Science
Economy
Country
Human
enhance our country‘s soft power
pave the way for future life
exploit the rich resources of oil
explore the mystery of the Earth and ocean
What aspects of people’s lives can be affected by heritage sites at risk
Challenges
high water pressure（para.3）
be attacked by the unkonwn sea creatures
poor visibility
the precarious submersible
the rapidly changing temperatures（para.3）
Summary
Our 1.___________(curious) about the unknown remains unshakeable. 2.______ is estimated that more than 80% of the world’s oceans are unexplored. So, if we want to find exciting new life forms, the ocean is 3._________ we should be looking.
The first 200 meters of our dive takes us through what can 4.____________(call) the open ocean, where most visible light exists. Here lives much of the marine life we know about. Below 200 meters, we enter the twilight zone, where there is little sunlight and thus almost no plant life. Most of the fish 5.________(live) here are small filter feeders which swim up at night to feed in the nutrient-rich waters above.
curiosity
It
where
be called
living
Summary
Once past 1,000 meters, we will reach the deep ocean, where there is no light. Creatures living in this extreme environment can rely not 6._______ their eyesight but others senses to survive. The fish in the deep ocean are among the strangest creatures on the Earth, many of 7._________ have yet to be properly studied.
On the ocean floor, we may see shrimps and other organisms around hydrothermal vents. It was this discovery 8._____ revealed life forms can obtain nutrients and energy from thermal sources. Besides, the deepest point of Mariana Trench, 9._________(know) as the Challenger Deep, is nearly 11,000 meters below sea level.
The world beneath the surface of the ocean is indeed an amazing place. With so much of the oceans left ______________ (explore), who knows what wonders still await us in the future
on
which
known
to explore
that