Unit 9. Undersea world

To Our Class
CROSSWORD GAME
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P A C I F I C
T U R T L E
A T L A N T I C
A N T A R C T I C
2. What is the biggest Ocean in the world?
D U G O N G
3. Which animal is it?
4. On which Ocean was the Titanic sunk?
5.This is the place where the penguins can live
1. What animanl is it?
What animal is it?
Which is the biggest ocean in the world?
This is the place where the penguins can live
Which animal is it?
4. On which ocean was the Titanic sunk?
I.Pre-reading:
There is only one ocean. It’s divided into five different parts: the
Pacific, Atlantic,Indian, Antartic, and Arctic Ocean. There are also many other smaller seas, gulf and bays which form part of them. Altogether they cover 75 percent of the earth’s surface. For centuries, people have challenged by the mysteries that lie beneath the ocean. However, today’s scientists have overcome many of the challenges ofthe 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 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.
- Work in groups, guess the words hidden from the given pictures and information.
- With a correct answer, your group will get 10 marks.
GAME: CATCHING WORDS
*gulf (n): vịnh
This is a large area of sea that is partly surrounded by land
Things that scientists bring back from the seabed for further study.
sample (n)
This is a modern device which the scientists use to investigate the seabed.
-> submarine (n)
Oversized(a)
Tiny (a)
->investigate (v)
-> challenge (n/v)
At stake = at risk
Biodiversity(n)
Water current (n)
I. Vocabulary:
gulf (n) / gʌlf / : vịnh biển
sample (n) [`sɑ:mpl] : mẫu vật
oversized (a) [`ouvəsaiz] : to quá khổ
tiny (a) [`taini] : nhỏ xíu
investigate (v) [in`vestigeit]: điều tra , nghiên cứu
challenge (n/v): [`t∫ælindʒ] thử thách
biodiversity (n) : đa dạng sinh học
submarine (n) [,sʌbmə`ri:n] : tàu ngầm
water current(n) : dòng nước
at stake = at risk : bị đe dọa
II.While you read
Task 1: fill each blank with one of the word given:
gulf oversized biodiversity challenges
investigate tiny samples provide

1. Some plants and animals are referred to as .....organisms because they are extremely small
2. Thank 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 the 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.
tiny
investigate
gulf
biodiversity
samples
Task 2 : answer the questions
1. What percentage of the earth’s surface is covered by seas and oceans?

2. How do scientists now overcome the challenges of the depth?

3. What can submarines do to help scientists know about the undersea world?

4. What can we learn from the satellite photos?

5. What are the three groups of marine plants and animals?

6. What would happen if the sea biodiversity were not maitained?
1. What percentage of the earth`s surface is covered by seas and oceans?
75 percent of the earth`s surface.
2. How do scientists now overcome the challenges
of the depth?
By using modern devices.
3. 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.
4. What can we learn from the satellite photos?
We can know a wide range of information, including water temperature, depth and the undersea populations.
5. What are the three groups of marine plants and animals?
They are :
- Those that live on or depend on
the bottom like starfish,
- Those that move independently of
water currents
- Those that are carried alone by
the currents.
6. What would happen if the sea biodiversity were not maintained?
The marine life would be at stake if the sea biodiversity was not maintained.
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
III. POST READING