Undersea world

Undersea world
Unit 9
UNDERSEA WORLD
SHARK
[∫ɑ:k]
DOLPHIN
[`dɔlfin]

WHALE
/weil/
SPERM WHALE
/ spə:m weil/
STARFISH
/ `stɑ:fi∫ /
TURTLE / `tə:tl /
SEAL /si:l /
Jellyfish /`dʒelifi∫/
Coral / `kɔrəl /
5 OCEANS OF THE WORLD
Thái Bình Dương
Ấn Độ Dương
Đại Tây Dương
Bắc Băng Dương
Nam Băng Dương
Gulf /gʌlf/ (n)
a large area of land that is partly surrounded by sea
GULF OF MEXICO
bay / bei / (n)
a part of the sea, or of a large lake, enclosed by a wide curve of the shore
Crescent Bay
Can Garden Bay
submarine / ,sʌbmə`ri:n / (n)
a ship that can travel underwater
e.g. a nuclear submarine
challenge / `t∫ælindʒ /
(n) a new or difficult task that test sb’s ability or skill.
e.g. New technology is one of the challenges schools must face.
(v) to test sb’s ability or skill, especially in an interesting way.
e.g. The job doesn’t really challenge her.
challenger (n) [`t∫ælindʒə]
challenging (a) [`t∫ælindʒiη]
e.g. Protecting environment is a challenging matter.
to investigate / in`vestigeit / (v)
to find out more information and facts about a subject or problem by study or research


investigation (n) [in,vesti`gei∫n]
investigator (n) [in`vestigeitə]
The woman is investigating the footprint
Water current (n)
/ `kʌrənt /

the movement of water in the sea or a river
organism / `ɔ:gənizm / (n)
a living thing, especially one that is extremely small

at stake / ət steik / : at risk, in danger
E.g.: If we don’t pay more attention to the protection of marine life, it may be at stake.
biodiversity / ,baioudai`və:siti / (n)

bio- : connected with living things or human life
diversity : the quality of including a range of people or things

the existence of a large number of different kinds of animals and plants which make a balanced environment
Read the text
There is only one ocean. It is divided into five different parts: the
Pacific, Atlantic,Indian, Antartic, and Arctic Ocean. There are also
many other smaller seas, gulfs and bays which form part of them.
Altogether they cover 75 percent of the earth’s surface. For centuries,
people have been challenged by the mysteries that lie beneath the ocean. However, today’s scientists have overcome many of the challenges of the depth by using modern devices. They send submarines to investigate the seabed and bring samples of marine life back to the surface for further study. Satellite photographs provide
a wide range of information, including water temperature, depth and
the undersea populations. If modern technology did not exit, we would never have such precious information.
Marine plants and animals fall into three major groups.
Some of them live on or depend on the bottom like the starfish.
Some are swimming animals such as fishes and sharks that move independently of water currents while others are tiny organisms that are carried along by the currents like the jellyfish. Plants and animals
of the sea, however small or oversized, all contribute to its biodiversity. Unless this biodiversity were maintained, marine life would be at stake.
Task 1
Some plants and animals are referred to as …………………
organisms because they are extremely small.
2. Thanks to modern technology, scientists have been
able to .……………………the life of plants and animals that live under the sea.
3. A ………………… is a large area of sea that is partly surrounded by land.
4. ……………………… is a term that refers to the
existence of different kinds of animals and plants
which make a balanced environment.
5. These scientists have collected different …………………
to analyse for their experiment.
biodiversity oversized gulf challenges investigate samples tidy provide.
investigate
gulf
Biodiversity
samples
tiny
Task 2:
Next
What percentage of the
earth’s surface is covered by seas and oceans?
75 percent of the earth’s surface.
How do scientists now
overcome the challenges
of the depth?
By using modern devices.
What can submarines do to help
scientists know about the
undersea world?
They investigate the seabed and bring samples of the marine life back to the surface for further
study.
What can we learn from
the satellite photos?
We can know a wide range of information, including water temperature, depth and the undersea populations.
What are the three groups of
marine plants and animals?
They are those that live on or depend on the bottom like the starfish, those that move independently of water currents like fishes and sharks and those that are carried alone by the currents like the jellyfish.
What would happen if the sea
biodiversity were not maintained?
The marine life would be at stake
if the sea biodiversity were
not maintained.
Plants and animals discoveries huge modern
closely connected three-quaters mysterious biodiversity
Though covering ………................. of the
earth’s surface, the ocean has
remained ………………… to us until recently. With ……………… technology
we have now made important ………………… about the …………………… of marine life. We have learnt that whether tiny or …………, all the …………..................... of the sea are …………………….
three-quarters
mysterious
modern
discoveries
biodiversity
huge
plants and animals
closely connected
Riddle
Thanks for your attention
RIDDLE
3. a. It is not a fish
c. It often attacks people and ship.
1. a. It is a very large kind of sea-fish.
c. People often hunt it for oil and flesh.
b. It is the largest mammal in the sea.
2. a. It is a large kind of sea-fish.
b. It has got a large mouth, sharp teeth and a triangular fin.
b. It is an�animal that is almost all mouth and arms
c. Its�arms�give it the shape of a star
Whale
Shark
Starfish
RIDDLE
6. a. It is one�of the strangest looking fish
c. They�don`t�walk�well on land.
4. a. They are�not�really fish
c. They are made almost entirely of water, which
is why you can look through them.
b. They have no bones at all.
5. a. Like dogs and whales, they are mammals.
b. They�are�excellent�swimmers.
b. It has a slim body and a thin, flexible tail.
Jellyfish
Seals
Sea horse
c. It has big eyes and a long, tube-shaped mouth
that looks like the snout of a horse.