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Chapter 3

Water Bodies

Class 6 - Veena Bhargava Geography Solutions

Tick the right option

Question 1

Which of the following is a marginal sea?

  1. Caspian Sea
  2. Aral Sea
  3. Bering Sea
  4. Red Sea

Answer

Bering Sea

Question 2

Lake Chilika is located in

  1. Pakistan
  2. USA
  3. India
  4. China

Answer

India

Question 3

River Nile is called the lifeline of

  1. Ethiopia
  2. Nigeria
  3. Egypt
  4. Europe

Answer

Egypt

Question 4

The Maldives are located in the

  1. Southern Ocean
  2. Indian Ocean
  3. Arctic Ocean
  4. Pacific Ocean

Answer

Indian Ocean

Question 5

Which of the following is not an "inland sea".

  1. Caspian sea
  2. Dead Sea
  3. North Sea
  4. Red Sea

Answer

North Sea

Question 6

The island in the Indian Ocean that is volcanic

  1. Nightingale island
  2. Flores island
  3. Line island
  4. Mauritius island

Answer

Mauritius island

Question 7

Which one is not a part of the Great Lakes.

  1. Lake Superior
  2. Lake Titicaca
  3. Lake Ontaria
  4. Lake Huron

Answer

Lake Titicaca

Question 8

They form good natural harbours

  1. Coast
  2. levee
  3. mouth of a river
  4. estuary

Answer

estuary

Question 9

Growth of Mangrove vegetation is supported by

  1. deltas
  2. distributaries
  3. inland waterways
  4. lakes

Answer

deltas

Question 10

It serves as an excellent means of measuring heights of landforms.

  1. water cycle
  2. Sea level
  3. waterfalls
  4. inland sea

Answer

Sea level

Question 11

The Arctic Ocean is connected to the Pacific Ocean by the

  1. Bering Strait
  2. Cook Strait
  3. Malacca Strait
  4. Palk Strait

Answer

Bering Strait

Question 12

The crest of the mountain from which streams flow down are known as

  1. watershed
  2. catchment
  3. estuary
  4. strait

Answer

watershed

Question 13

Ocean with the lowest salinity.

  1. Pacific Ocean
  2. Arctic Ocean
  3. Southern Ocean
  4. Atlantic Ocean

Answer

Arctic Ocean

Question 14

Ocean that occupies an elongated S-shaped basin.

  1. Atlantic Ocean
  2. Pacific Ocean
  3. Indian Ocean
  4. Southern Ocean

Answer

Atlantic Ocean

Fill in the blanks

Question 1

The oceans account for ............... of the earth.

Answer

The oceans account for 71% of the earth.

Question 2

The Pacific Ocean has a string of ............... along the coastal margins of the continents.

Answer

The Pacific Ocean has a string of volcanoes along the coastal margins of the continents.

Question 3

Arctic Ocean remains perpetually ............... .

Answer

Arctic Ocean remains perpetually frozen.

Question 4

The salt concentration in Dead Sea is around ............... .

Answer

The salt concentration in Dead Sea is around 250 parts per thousand.

Question 5

Lakes are larger and deeper than ............... .

Answer

Lakes are larger and deeper than ponds.

Differentiate between

Question 1

Marginal sea and inland sea

Answer

Sl.
No.		Marginal SeaInland Sea
1.A Marginal sea is a division of an ocean, partially enclosed by islands, archipelagos or peninsulas, adjacent to the open ocean at the surface, or bounded by the submarine ridges on the sea floor.Large lakes in continental areas are termed as Inland seas.
2.Example: Bering sea, North seaExample: Aral Sea, Red Sea

Question 2

Ocean and sea

Answer

Sl.
No.		OceanSea
1.Ocean is large section of single great water body covering most of the earth's surface.Sea is a large body of salt water that is surrounded in whole or part by land.
2.Ocean is larger than sea.Sea is smaller than ocean.
3.Ocean is deeper.Sea is shallower.
4.Big currents flow through them.Big currents do not flow through them.

Question 3

Arctic Ocean and Southern Ocean

Answer

Sl.
No.		Arctic OceanSouthern Ocean
1.It is situated around North pole.It surrounds the continent of Antarctica in the Southern Hemisphere.
2.Arctic Ocean is the smallest of all the oceans.Southern Ocean is larger than Arctic ocean.
2.It is connected to Atlantic Ocean by the eastern and western Greenland channels and to the Pacific Ocean by the Bering Strait.It is an extension of the Pacific, Atlantic and Indian Oceans.

Answer in brief

Question 1

What do you mean by water cycle? Explain with the help of a neat diagram.

Answer

The continuous interchange of water between the oceans, atmosphere and land is called Hydrological cycle or Water cycle. It connects all the three realms of the earth: lithosphere, hydrosphere and atmosphere.

The differential heating of the earth by the sun causes water to evaporate. The atmospheric blanket around the earth does not allow water vapour to escape. When the water vapour comes in contact with the cooler layers of atmosphere, it condenses to form clouds and falls back on the earth in the form of rain, snow or hail. This water flows into rivers or goes underground or back into the oceans. This circulation of water in different forms is called water cycle.

What do you mean by water cycle? Explain with the help of a neat diagram. Water Bodies, Geography Veena Bhargava Goyal Brothers Solutions ICSE Class 6.

Question 2

State two characteristic features of the Atlantic Ocean.

Answer

Two characteristic features of the Atlantic Ocean are:

  1. It is the second largest ocean of the world.
  2. It is the saltiest major ocean.

Question 3

What is the importance of ocean?

Answer

Oceans are of great importance to man directly or indirectly. Following are the importance of ocean:

  1. Source of water — Ocean is the major source of water to mankind through water cycle.
  2. Climate — Oceans affect the climate of the places near them by maintaining their temperature, humidity, rain etc.
  3. Food Resources — The oceans provide fish and other marine food and thus are an important food resource.
  4. Mineral and chemical resource — They have a variety of dissolved salts like sodium chloride, magnesium chloride, potassium chloride etc.
  5. Ocean and oil — A large part of world's oil and gas production comes from off shore fields.
  6. Ocean and energy — They help to generate tidal energy. Countries like France, UK, USA are generating energy from tides.
  7. Trade and transport — Oceans provide the cheapest mode of transportation for international trade. They are very useful for transportation of bulky products like coal, iron, machinery etc.

Question 4

What are marginal seas? Name two marginal seas.

Answer

A Marginal sea is a division of an ocean, partially enclosed by islands, archipelagos or peninsulas, adjacent to the open ocean at the surface, or bounded by the submarine ridges on the sea floor. Two Marginal seas are:

  1. Bering Sea
  2. Arabian Sea

Question 5

Explain two causes of pollution of water bodies with examples.

Answer

Two causes of pollution of water bodies are:

  1. Urbanisation — Rapid urbanisation in India during the recent decades has given rise to a number of environmental problems such as water supply, waste water generation and its collection, treatment and disposal. For example, pollution in major rivers.
  2. Oil spills — Waste oil from city drains, tankers and leakage from oil wells cause the oil to seep into the sea and pollute water. Massive oil spills at sea by huge oil tankers severely pollute the oceans.

Give reasons

Question 1

Southern Ocean is not navigable.

Answer

Southern Ocean is not navigable because it remains frozen for the most part of the year.

Question 2

Atlantic ocean is a great commercial highway.

Answer

Atlantic ocean is bounded by North and South Americas in the west and Africa and Europe in the east. It connects two of the most developed regions of the world, North America and Europe. Most of the world's great ports lie on its coast. This makes it a great commercial highway.

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