Unit 9. Undersea world

Unit 9
Undersea World
Part A
READING
Before you read
Work with a partner. Look at the map and give the Vietnamese names for the oceans on the map.
(Antarctic Ocean)
Arctic Ocean
Antarctic Ocean
Pacific Ocean
Atlantic Ocean
Indian Ocean
One ocean
Work with a partner. Look at the pictures below. Can you name the sea animal in each picture? The first letter of the word has been given to help you.
J…………………………
T………………………….
S………………………
S………………………………..
Seal
Jellyfish
Turtle
Shark
While you read


sea
gulf [ gʌlf](n)
bay
ocean
challenge [`t∫ælindʒ](n)
mystery [`mistəri] (n)
beneath [bi`ni:θ] (adv)
submarine[,sʌbmə`ri:n] (a)
seabed [`si:`bed] (n)
New words.
jellyfish
starfish
fishes
shark
population [,pɔpju`lei∫n] (n)
maintain [mein`tein] (v)
be at stake [ətsteik] = be in danger
biodiversity [,baioudai`və:siti] (n)
organism [`ɔ:gənizm] (n)

precious[`pre∫əs] (a)
dependent on/ upon [di`pendənt] (a) ≠

independent of [,indi`pendənt]
Task 1


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 __________ analyse for their experiment.
gulf
oversized
biodiversity
challenges
investigate
tiny
samples
provide
Task 2
Read the passage again and answer the following questions.
1. 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 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 the starfish, those that move independently of water currents and those that are carried along by the current.
6. What would happen if the sea biodiversity were not maintained?
Marine life would be at stake if the sea biodiversity were not maintained.
After you read
Work in pairs. Complete the summary of the reading passage by filling each blank with a word or phrase given in the box below.


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 learnt that whether tiny or (6) ____________ , all the (7) _______________ of the sea are (8) _______________.
plants and animals
closely
huge
discoveries
connected
biodiversity
modern
three-quarters
mysterious
The end of the lesson