Unit 9

STARFISH
JELLYFISH
SHARK
TURTLE
SEAL
Undersea world
There is only one ocean. It is divided into five different parts: the Pacific, Atlantic, Indian, Antarctic, and Arctic Oceans. 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 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 exist, we would never have such precious information.

Marine plants and animal 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.
There is only one ocean. It is divided into five different parts: the Pacific, Atlantic, Indian, Antarctic, and Arctic Oceans. 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 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 exist, we would never have such precious information.

Marine plants and animal 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.
Scan the text and find out the position of the following words

Gulf, challenges, investigate, samples, provide, tiny, oversized, biodiversity
Fill in each blank with one of the above words

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 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 analyze .


Task 1
tiny
investigate
gulf
Biodiversity
samples
TASK 2
Read the passage and decide whether the following statements are True or False:

1. There are four oceans in the world.

2. The continents cover 25% of the earth’s surface.

3. People use boats to investigate the seabed.

4. Water temperature, depth and the undersea populations are shown by the satellite photographs.

5. If the biodiversity were maintained, marine life would be at stake.




F
T
F
T
F
TASK 3
Look at these creatures and scan the text to find out where they live
Starfishes live on the bottom of the ocean.
Jellyfishes are carried along by the currents
Sharks move independently of water currents