Oceanography

SYLLABUS

Relief of Oceans, Composition: Temperature, Density and Salinity, Circulation: Warm and Cold Currents, Waves, Tides, Sea Level Changes, Hazards: Tsunami and Cyclone

Ocean Relief

  • The Ocean Relief Features are quite different from the continental features because the Oceanic crust is less than 60-70- million years old whereas continental features are of Proterozoic age .
  • While there is only one global ocean, the vast body of water that covers 71 percent of the Earth is geographically divided into distinct named regions. The boundaries between these regions have evolved over time for a variety of historical, cultural, geographical, and scientific reasons.
  • Historically, there are four named oceans: the Atlantic, Pacific, Indian, and Arctic. However, a new ocean has now been recognized as the Southern (Antarctic) ocean as the fifth ocean. The Pacific, Atlantic, and Indian are known as the three major oceans.
  • They are the source of food– fish, mammals, reptiles, salt, and other marine foodstuffs.
  • The tides can be harnessed to provide power.
  • Oceanography is the branch of science that deals with the physical and biological properties and phenomena of the sea.
  • Earlier echo-sounding techniques were used, now radar soundings and electrical Echo devices are used to find the precise depths of ocean floors and map the relief of oceans.

Ocean Relief Features

  • The oceans, unlike the continents, merge so naturally into one another that it is hard to demarcate them.
  • The geographers have divided the oceanic part of the earth into five oceans, namely the Pacific, the Atlantic, the Indian, Southern, and the Arctic.
  • The various seas, bays, gulfs, and other inlets are parts of these four large oceans.
  • A major portion of the ocean floor is found between 3-6 km below the sea level.
  • The floors of the oceans are rugged with the world’s largest mountain ranges, deepest trenches, and the largest plains. These features are formed, like those of the continents, by the factors of tectonic, volcanic, and depositional processes.

Major Ocean Relief Features

The ocean floors can be divided into four major divisions:

  • the Continental Shelf
  • the Continental Slope
  • the Deep Sea Plain
  • the Oceanic Deeps

MOCK TEST

0%
0 votes, 0 avg
19
Created by Nabarun Academy
Best Geography Coaching Centre in Kolkata

OCEANOGRAPHY MOCK TEST SET _1

1 / 13

1. The Sargasso Sea (Weed Growing Sea) lies in the

2 / 13

2. Which country headed the Challenger Expedition (1872-76)

3 / 13

3. Flat topped volcanic hills submerged under ocean water are called

4 / 13

4. Who is called Father of Oceanography?

5 / 13

5. The ocean water was iceberg free during the era

6 / 13

6. because of the The Oceanic ridge come into existence

7 / 13

7. Surface Circulation of Ocean water is due to

8 / 13

8. The precious minerals like Petroleum and Natural Gas are found in

9 / 13

9. Which one of the following is correct arrangement of oceans in ascending order as of their size

10 / 13

10. The Diego Garcia is an island located in in which of the following oceans

11 / 13

11. The line joining the points of Equal depth are known as

12 / 13

12. The Average temperature of the surface water of the ocean is

13 / 13

13. Kiel Canal Connects

Your score is

The average score is 36%

Facebook Twitter VKontakte
0%

0%
0 votes, 0 avg
10
Created by Nabarun Academy
Best Geography Coaching Centre in Kolkata

OCEANOGRAPHY MOCK TEST SET _2

1 / 14

1. The cold current flowing along the coast of Chile and Peru is known as

2 / 14

2. The average difference in the water level between high tide and low tide at a place is referred to as

3 / 14

3. What is the most common salt in the sea water?

4 / 14

4. The average salinity of ocean water is

5 / 14

5. The average density of sea water is

6 / 14

6. The Bosphorus Strait is located between

7 / 14

7. The busiest oceanic Route is

8 / 14

8. Most of the salt in the sea water is derived from

9 / 14

9. The maximum oceanic salinity is found in

10 / 14

10. Which one of the following has the highest salinity level?

11 / 14

11. The Turbidity Current Theory is responsible for

12 / 14

12. Archipelago refers to

13 / 14

13. The Great Barrier Reef is located

14 / 14

14. The most important source of iodine and potash in ocean water is

Your score is

The average score is 42%

Facebook Twitter VKontakte
0%

0%
0 votes, 0 avg
8
Created by Nabarun Academy
Best Geography Coaching Centre in Kolkata

OCEANOGRAPHY MOCK TEST SET _3

1 / 12

1. In which year Titanic ship sunk in North Atlantic Ocean

2 / 12

2. Diatom ooze is very frequently found at greater depth in

3 / 12

3. A Nautical mile is equal to

4 / 12

4. The difference between high tide water and low tide water is called

5 / 12

5. What is Diatoms?

6 / 12

6. The highest tide occurs in India is near

7 / 12

7. Which of the following seas has the highest salinity

8 / 12

8. The largest tide occurs in the world in

9 / 12

9. The major cause of Titanic ship sinking in North Atlantic Ocean was

10 / 12

10. The S-shape bottom reliefs are found in

11 / 12

11. The Echo sounder instrument measures the

12 / 12

12. The Bermuda Triangle or Devil's Triangle lies on

Your score is

The average score is 58%

Facebook Twitter VKontakte
0%

0%
0 votes, 0 avg
7
Created by Nabarun Academy
Best Geography Coaching Centre in Kolkata

OCEANOGRAPHY MOCK TEST SET _4

1 / 14

1. Diamond Harbour and Salt Lake City are situated in

2 / 14

2. The wave-cut platform is found in

3 / 14

3. The Guam is an Island in Micronesia which lies on

4 / 14

4. Spring and Neap Tides

5 / 14

5. The Socotra Island is situated in

6 / 14

6. A Shallow stretch of seawater partly on completely separated from the open ocean by a reef is called

7 / 14

7. Seiche is a type of

8 / 14

8. Salinity in water bodies increase with

9 / 14

9. What is the ideal temperature required for survival of coral reefs

10 / 14

10. Which one of the following sea is without a coast line?

11 / 14

11. The density of sea water depends upon

12 / 14

12. Coral reefs are normally found between

13 / 14

13. The first marine sanctuary in India, having its bounds coral reefs, mollusca, dolphins, tortoise and various kinds of sea birds, has been established in

14 / 14

14. The general depth of Abyssal Plains varies between

Your score is

The average score is 47%

Facebook Twitter VKontakte
0%

0%
0 votes, 0 avg
9
Created by Nabarun Academy
Best Geography Coaching Centre in Kolkata

OCEANOGRAPHY MOCK TEST SET _5

1 / 14

1. In Grand Bank and George Bank abundant productive fishing ground are found due to

2 / 14

2. What is La Nina

3 / 14

3. Who Propounded Subsidence Theory of formation of coral reefs

4 / 14

4. The Glacial Control Theory of formation of coral reefs was propounded by

5 / 14

5. The famous productive fishing ground Dogger bank are lies in

6 / 14

6. Who propounded the theory of stand still theory of formation for coral reefs?

7 / 14

7. Which features are called rainforest of oceans?

8 / 14

8. What is the most important effects of oceanic currents?

9 / 14

9. What is the real time taken by the tide?

10 / 14

10. Which one of the following countries has the world's longest coastline

11 / 14

11. Kiel Canal Connects

12 / 14

12. A cold ocean current flows from south to north along the western coast of South Africa is called

13 / 14

13. Which of the following is the islands of corals

14 / 14

14. Which of the following area is called Cape of Good Hope

Your score is

The average score is 45%

Facebook Twitter VKontakte
0%

Welcome

More information

Coming Soon