C-06 — Hydrosphere

What does the word 'Hydro' mean?

What does the word 'sphere' indicate?

In how many physical forms does water exist on the earth?

Water exists in the atmosphere in which form?

What percentage of the total volume of water is held by the oceans?

Rivers, glaciers, ground water, lakes, soils, atmosphere and biosphere together contain what percentage of the world's water?

The total water of the earth can be divided into how many types?

Salt water of the earth exists in which of the following?

Where does fresh water mainly exist?

According to Table 1, what is the volume of ocean water (ME × 1,00,000)?

The percentage of glacier water on the earth is —

The percentage of ground water on the earth is —

What percentage of water is contained in lakes?

The percentage of water in the atmosphere is —

What percentage of water is contained in rivers?

What percentage of water is contained in the biosphere?

After the oceans, which source contains the largest share of the earth's water?

Consider the following about the hydrosphere:

How many oceans are there on the earth?

Which is the largest and deepest ocean of the world?

Which ocean is characterised by deep coastline and creates a number of enclosed seas?

The Indian ocean is encircled with which continents?

The Southern ocean is located between —

The Arctic sea is located in —

The area of the Pacific ocean is —

The average depth of the Pacific ocean is —

The average depth of the Atlantic ocean is —

The average depth of the Indian ocean is —

The average depth of the Northern (Arctic) ocean is —

The average depth of the Southern ocean is —

The Atlantic ocean lies between which continents?

The Indian ocean lies between which land masses?

Which of the following best defines an ocean?

Which of the following is NOT a sea?

Which water body is enclosed by land on three sides but open with a wide mouth on one side?

Which of the following is an example of a bay?

A water body completely surrounded by land is called —

Which of the following is a lake located between USA and Canada?

Lake Baikal is located in —

Lake Victoria is located in —

The roughness of the ocean floor is mainly due to the presence of —

By which means is the depth of the seas measured?

Sound wave can travel through how deep water and come back?

Which instrument is used to measure the depth of the sea?

The land configuration of the ocean floor is divided into how many classes?

Which of the following is NOT a division of the ocean floor?

A submerged border of a continent that slopes gradually to a point of steeper descent is called —

The depth of the continental shelf is generally limited to less than —

The general gradient of the continental shelf is —

The average width of the continental shelf is —

The innermost part of the continental shelf is called the —

The widest continental shelf is located at —

The continental shelf at the north of Europe extends up to about —

The second widest continental shelf is at —

The western coast of North America has a narrower shelf because of —

The eastern and western continental shelves of Africa are very narrow because —

Which of the following causes the formation of continental shelves?

The depth of the continental slope starts from — and stretches up to —

The average width of the continental slope varies from —

The rough surface of the continental slope is produced by —

Corals and sediments are deposited in which part of the continental slope?

The average depth of the deep sea plains is —

Why are deep sea plains NOT completely flat?

Volcanic peaks rising from deep sea plains sometimes reach the surface as —

Mid-oceanic Ridges are found in places where —

Mid-Atlantic ridge is a well known example of —

New oceanic crust is formed when —

What is the shape of an oceanic trench?

The average depth of oceanic trenches is above —

Most of the oceanic trenches are found at —

Which is the deepest trench of the world?

The Mariana trench is located —

The average depth of the Mariana trench is —

The depth of the Puerto Rico Trench (in the Atlantic ocean) is —

The Sunda trench is located in —

What is meant by ocean current?

Ocean currents are mainly caused by —

A change in density of sea water is due to variations in —

Based on temperature, ocean currents are classified into —

Warm currents move from —

Cold currents originate from —

Cold water sinks downwards because it is —

The prime cause of ocean currents is —

Which of the following winds create major ocean currents?

Earth's rotation results in which law that influences ocean currents?

According to Ferrel's law, ocean currents in the Northern Hemisphere bend to the —

In the Southern Hemisphere, ocean currents bend to the —

Equatorial warm water flows toward the poles as —

Cold dense water flows from poles to equator as —

Melting of polar ice caps helps to generate ocean currents because it —

The speed of ocean current decreases below —

Which of the following statements about water density is correct?

The existence of continents, islands and other land masses on the flow of water —

Warm ocean currents — the temperature of an area through which they pass.

Norway and the west coast of the British islands remain free from frost in winter due to —

Despite being at the same latitude as Britain, the east coast of Canada remains covered with ice. The main reason is —

The California current is a — current that makes the western coast of USA cooler than other places at the same latitude.

Boats and ships can easily sail —

Which ocean current supports the major transportation routes of the world?

Warm currents keep the Arctic regions —

Surface warm currents make heavy rainfall over the coasts because they carry —

The Gulf Stream makes north-west Europe much more — than other regions in the same latitude.

Cold ocean currents make the winds —

The Atacama cold desert in South America is caused by —

Where do fog and cyclones form most often?

In the eastern coastal area of North America, fog and storms are formed by the merging of —

Off Japan, bad weather is caused by the merging of —

Underwater plateaus and highlands are formed because —

The Grand Bank is located near —

The Dogger Bank is located near —

Places where cold and warm currents meet are ideal breeding grounds for —

Newfoundland is one of the major fishing grounds of the world because it is the meeting point of —

The famous ship 'Titanic' sank into the water because of —

The prime causes of tides are —

When the Sun and Moon are aligned with the Earth, what happens to ocean water fronting them?

Which of the following has a larger effect on tides?

The Sun's effect on tides is about — of the Moon's effect.

Gravitational force between two masses changes how with distance?

Tides on the opposite side of the earth from the Moon are mainly caused by —

The cyclic rise and fall of sea level caused by the gravitational pull of the sun and moon is called —

How many high tides and low tides usually occur in each lunar day?

Low tide refers to —

Which of the following is an effect of tides?

Tides occurring twice a day help to —

River passages get deeper because of tides through —

Electricity can be produced from tidal rivers by —

In Polar regions, tides help by —

Which two prime ports of Bangladesh operate their activities tuning with the tides?

During full moon, tidal surge can —

The length of the coastal region of Bangladesh along the Bay of Bengal is —

The number of near-shore fish species in the Bay of Bengal is —

How many species of Mollusks are found in the coastal region of Bangladesh?

How many species of prawn are found in the Bay of Bengal coast of Bangladesh?

Which of the following nuclear minerals is NOT found in the coastal zones of Cox's Bazar?

Nuclear minerals like Zircon, Monazite and Ilmenite are found in the coastal zones of —

What is an iceberg?

The depth of the ocean is related to:

Why can ships navigate the current area marked 'P' throughout the year?

The combination of the currents 'Q' and 'R' creates —

What is an oceanic plateau (under-water plateau)?

What is a deep sea plain?

Why is the region near the Labrador Islands covered with ice year-round?

What is the hydrosphere?

Which of the following is an effect of warm ocean currents?

What is the sea?

If the warm and cold currents at locations 'P' and 'B' fail to circulate, what will MOST likely happen to trade in the area?