牛津译林版（2020）选修第一册Unit 1 Food matters Reading The ocean deep课件 (共24张PPT，内嵌视频)

(共24张PPT)
The ocean deep
pay attention to the figures/ numbers
The ocean is full of magic and mystery.
What do you know about the world beneath the ocean
The ocean covers around of the surface of our planet.
Yet is still unexplored.
take a unique journey to explore more.
The ocean is home to over species, which is the world’s largest habitat.
The ocean gives us around our oxygen.
70%
240,000
90%
50%
Take a unique journey to explore more.
Reading for the structure
Introduction
Para 1
Main body
Paras 2-4
Main body
Paras 2-4
Conclusion
Para 5
Reading for details (Para 1)
Why does the author mention the exploration of the space
We look upwards and wonder what lies beyond our planet. We send probes into the vastnes of space to explore the unknown. We build space stations to advance our understanding of the universe. Our curiosity about outer space has remained unshakeable. Meanwhile, it is estimated that more than eighty per cent of the world's oceans are unexplored. So, if we want to find exciting new life forms as well as undiscovered and unusual geological formations, the ocean is where we should also be looking. Then why don't we dive to the bottom of a really deep ocean and take a long, close look beneath the waves
Main idea: We should explore the world _____________the ocean for ________________ and _____________________________.
Reading for details (Para 1)
Why does the author mention the exploration of the space
Reading for details (Para 1)
We look upwards and wonder what lies beyond our planet.
We send probhe vastness of space to explore the unknown.
We build space stations to advance our understanding of the universe.
Our curiosity about outer space has remained unshakeable.
The ocean should be explored and is well worth exploring just like outer space.
The ocean is full of mysteries, waiting to be solved
Analogy
it refers to a comparsion between two things that are similar in some way, often used to explain something unfamiliar.
Meanwhile, it is estimated that more than eighty per cent of the world's oceans are unexplored. So, if we want to find exciting new life forms as well as undiscovered and unusual geological formations, the ocean is where we should also be looking. Then why don't we dive to the bottom of a really deep ocean and take a long, close look beneath the waves
Reading for details (Para 1)
Main idea: We should explore the world _____________the ocean for ________________ and _____________________________.
beneath
unusual geological formations.
new life forms
Reading for details (Paras 2 )
The first 200 metres of our dive takes us through what can be called the open ocean, where most visible light exists. Here lives much of the marine life we know about, such as dolphins, corals and sea weeds. Sinking below 200 metres, we enter the twilight zone, where there is little sunlight and thus almost no plant life. Most of the fish living here are small filter feeders which swim up at night to feed in the nutrient-rich waters above. Also living in the twilight zone are hunters with telescopic, upward-pointing eyes that can easily spot a meal in the waters above.
Names Depths Conditions Life forms/Geological formations
The open ocean the first _____ metres _______ light much of the marine life such as
__________________________
The __________ below 200 metres _____ sunlight No ______life, small _________________,
hunters with ___________________eyes
200
twilight zone
visible
little
dolphins, corals and seaweeds
plant
filter feeders
telescopic, upward-pointing
Reading for details (Paras 2 )
Consequently, the fish most likely to be eaten have evolved to have thin bodies so that they are less easily seen from below. However,once they are captured, the hunters' backward-curving teeth prevent them from getting away. Evolution, it seems, helps both the hunter and the hunted in equal measure!
How do you understand the last sentence
It helps the hunter evolve unique characteristics, which can allow them .
Meanwhile, it also helps the prey evolve survival characteristics and .
to catch the prey more easily
get away from the hunter
backward-curving and sharp teeth
thin body to avoid being seen and eaten
Main idea:Much of the _______ marine life lives in the _____________,
and_____________________and _________ live in the ______________.
open ocean
twilight zone
known
small filter feeders
hunters
Reading for details (Paras 3 )
Once past 1,000 metres, we have reached the deep ocean, where there is no light and temperature drop just above freezing The pressures are huge and can be more than 100 times the pressure of the Earh's atmophere. It is then surprsing that many creatures can live in this extreme environment. They cannot rely solely on their eyesight to survive and have evolved fascinating survival characteristics. Indeed, many organisms in the deep ocean are blind. In order to obtain food and avoid being caught, they have to depend on other senses such as smell and their ability to detect slight changes in water pressure. Also, some fish have both male and female organs to increase the chances or reproduction, as fish are so scarce at these depths that it can be difficult for them to find a mate. The fish in the deep ocean are among the strangest creatures on the Earth,many of which have yet to be properly studied.
The deep ocean past ____ metres ______light, above ______ temperatures, ______pressure
__________organisms,
fish having both _______________organs
Main idea:The__________is home to the __________ creatures on the Earth.
deep ocean
strangest
Reading for details (Paras 3 )
Once past 1,000 metres, we have reached the deep ocean, where there is no light and temperature drop just above freezing The pressures are huge and can be more than 100 times the pressure of the Earh's atmophere. It is then surprsing that many creatures can live in this extreme environment. They cannot rely solely on their eyesight to survive and have evolved fascinating survival characteristics. Indeed, many organisms in the deep ocean are blind. In order to obtain food and avoid being caught, they have to depend on other senses such as smell and their ability to detect slight changes in water pressure. Also, some fish have both male and female organs to increase the chances or reproduction, as fish are so scarce at these depths that it can be difficult for them to find a mate. The fish in the deep ocean are among the strangest creatures on the Earth,many of which have yet to be properly studied.
The deep ocean past ____ metres ______light, above ______ temperatures, ______pressure
__________organisms,
fish having both _______________organs
1000
no
freezing
huge
blind
male and female
have both male and female organs
blind
ability to detect
Reading for details (Para 4)
On reaching the ocean floor, we may see shrimps and other organisms around hydrothermal vents. These vents form in volcanically active areas, pouring mineral-rich fluids into the sea. Before the discovery of these creatures, it was thought that all life on the Earth obtained its energy from the sun. However, this discovery has revealed that life forms can obtain nutrients and energy from thermal sources. Knowing that life can exist in these extreme conditions has changed scientific opinion about the chances of there being life else where in the universe.
The ocean floor the deepest point ---nearly _______ metres below sea level ___________ conditions
________________________________
11,000
extreme
shrimps, remarkable organisms,
vents, rock bridges
What has changed scientific opinion about the chances of there being life elsewhere in the universe
Reading for details (Para 4)
In addition to the vents and remarkable organisms, we cannot miss the Mariana Trench, located in the north-western part of the Pacific Ocean. Its deepest point, known as the Challenger Deep, is nearly 11,000 metres below sea level. You could place Moun Qomolangma in the Challenger Deep, and its top would still be more than 2,000 metres below the surface! While there is little life at such great depths, it is far from boring. Of the many strange geological formations to be found here are rock bridges which cross the Trench, some reaching a height of 2,500 metres above the Challenger Deep.
Why does the author mention Mount Qomolangma when describing the Challenger Deep
Main idea: ___________________ live around ______________ , and the___________ can be found on ______________ .
Main idea: ______________________________ live around ______________ , and the_____________ can be found on ______________ .
Reading for details (Para 4)
Why does the author mention Mount Qomolangma when describing the Challenger Deep
The author wants to highlight how deep the Challenger Deep is. By comparing it to the highest mountain in the world, Mount Qomolangma, the author helps the reader visualize its depth.
hydrothermal vents
Mariana Trench
the ocean floor
Shrimps and other organisms
Reading for details (Paras 2-4)
Major zones of the ocean Names Depths Conditions Life forms/Geological formations
The open ocean the first _____ metres _______ light much of the marine life such as
__________________________
The __________ below 200 metres _____ sunlight No ______life, small _________________,
hunters with ___________________eyes
The deep ocean past ____ metres ______light, above ______ temperatures, ______pressure
__________organisms,
fish having both _______________organs
The ocean floor the deepest point ---nearly _______ metres below sea level ___________ conditions
________________________________
200
visible
dolphins, corals and seaweeds
twilight zone
little
plant
telescopic, upward-pointing
filter feeders
1000
no
freezing
huge
blind
male and female
11,000
extreme
shrimps, remarkable organisms,
vents, rock bridges
Reading for details (Para 5)
As you can see, the world beneath the surface of the ocean is indeed an amazing place. On our journey down, we have been fascinated by incredible geological formations as well as unexpected life forms that have become strangely adapted to their extreme environment. With so much of the oceans left to explore, who knows what wonders still await us in the future
How is paragraph 5 related to paragraph 1
Echo
a rhetorical
question
More wonders beneath the surface of the ocean us.
await
Read for structure
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 , and small filter feeders and hunters live in the .
The is home to the strangest creatures on the Earth.
Shrimps and other organisms live around , and the can be found on the ocean floor.
More wonders beneath the surface of the ocean us.
open ocean
twilight zone
deep ocean
hydrothermal vents
await
Mariana Trench
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
Read for writing techniques
the writing order
the open ocean
(200m)
the twilight zone
(200~1000m)
the deep ocean
(past 1000m)
（2022年全国甲卷）你校将以六月八日世界海洋日为主题，举办英语征文比赛，请你写一篇短文投稿。内容包括：海洋的重要性；保护海洋的倡议。When it comes to ocean, its pollution is _______________________(变得越来越严重）. World Ocean Day, which falls on June 8th, is aimed at __________(提高/唤起) awareness of ocean conservation. Ocean plays a _____________(重要的) role in our world. ____________________________________________________________________(海洋不仅为我们提供充足的食物，而且还维持着自然的平衡。用部分倒装）Thus, it is imperative (重要紧急的）to protect ocean. First of all, what we can do is to _______________________(重视) our daily actions. For example, garbage can’t be thrown into ocean. ________________(而且), we can also hand out leaflets to call on more people to protect the ocean. The more people are involved, _______________(越来越好) the ocean environment is. ______________________(总之), it is high time that we __________________________(致力于保护海洋). To protect ocean is to protect ourselves.
becoming increasingly serious/
going from bad to worse
raising/arousing
dramatic/critical
Not only does ocean offer us sufficient food, but also it maintains the balance of nature.
attach importance/significance to
Furthermore/Additionally
the better
All in all/In brief/To sum up
devoted ourselves to protecting ocean.