Unit 9: UNDERSEA WORLD
PART A: READING
* Look at the map and give the Vietnamese names for the oceans on the map
How many oceans are there in the world?
*
*
*
*
*
What are they?
Thái Bình Dương
Đại Tây Dương
ấn D? Duong
Nam Băng Dương
Bắc Băng Dương
1. Do you see these animals ?
2. Where do they live ?
Seal
Jellyfish
Turtle
Shark
IN THE OCEA NS
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.

* NEW WORDS
- Mystery (n) : [`mistəri]
- Beneath (pre) : [bi`ni:θ]
- Device (n): /di`vais/
- Submarine (n) : [,sʌbmə`ri:n]
- Seabed (n) : [`si:`bed]
- Satellite (n) : [`sætəlait]
Tầu Ngầm
Thiết bị
Bên dưới
Bí ẩn
Đáy biển
Vệ Tinh

* NEW WORDS
- be at stake [bi: ət steik]
- Organism (n) : [`ɔ:gənizm]
- Marine (adj) : [mə`ri:n]
- Current (n) : [`kʌrənt]
- Maintain (v) : [mein`tein]
Bị đe dọa
Sinh vật
Thuộc về biển
Dòng chảy
Duy trì
NEW WORDS
- Mystery (n) : [`mistəri]
- Device (n): /di`vais/
- Beneath (pre) : [bi`ni:θ]
- Submarine (n) : [,sʌbmə`ri:n]
- Seabed (n) : [`si:`bed]
- Satellite (n) : [`sætəlait]
- be at stake [bi: ət steik]
- Organism (n) : [`ɔ:gənizm]
- Marine (adj) : [mə`ri:n]
- Current (n) : [`kʌrənt]
- Maintain (v) : [mein`tein]
Task 1. The words in the box all appear in the passage. Fill in each blank with one of them. There are more words than needed.
gulf (n) oversized (adj) biodiversity (n) challenges (n)
investigate (v) tiny (adj) samples (n) provide (v)
Some plants and animals are referred to as ……….........organisms because they are extremely small.
Thanks to modern technology, scientists have been able to …..………………… the life of plants and animals that live under the sea.
A ………….. is a large area of sea that is partly surrounded by land
………………………. is a term that refers to the existence of different kinds of animals and plants which make a balanced environment.
These scientists have collected different …………………… to analyze for their experiment.
investigate
samples
tiny
gulf
Biodiversity
Task 2. Read the passage again and then answer the following questions.
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 maintained ?
Answers
What percentage of the earth’s surface is covered by seas and oceans ?
=> 75% 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 th 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 population.
5. 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 the water currents and those are carried along by the currents.
6. What would happen if the sea biodiversity were not maintained ?
=> Marine life would be at stake if the sea biodiversity were not maintained.
Work in pairs. Complete of the summary of the reading passage by filling each blank with a word or phrase given in the box below.
plants and animals (n.p) discoveries(n) huge(adj) closely connected (n.p)
Modern (n) three – quarters (n) mysterious(n) biodiversity (n)
Though covering (1) ……………….…… of the earth’s surface, the ocean has remained (2) ……………… to us until recently. With (3) ……………….. technology we have now made important (4) ……………………...about the (5) ………………… of marine life. We have learn that whether tiny or (6) ……..…………., all the (7)………………………….. of the sea are (8)……
………………………. .
three - quarters
mysterious
modern
discoveries
biodiversity
huge
plants and animals
closely connected
III. After you read
homework
Learn the vocabulary.
Do exercises in the workbook.
3. Prepare the next lesson : B. Speaking