GK Questions NCERT Solutions (Part-31) – minor relief feature in the oceans.
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- Question 1 of 5
1. Question
1 pointsWhich one of the following is not a minor relief feature in the oceans:-
CorrectANSWER-Atoll
These are low islands found in the tropical oceans consisting of coral reefs surrounding a central depression. It may be a part of the sea (lagoon), or sometimes form enclosing a body of fresh, brackish, or highly saline water.
IncorrectANSWER-Atoll
These are low islands found in the tropical oceans consisting of coral reefs surrounding a central depression. It may be a part of the sea (lagoon), or sometimes form enclosing a body of fresh, brackish, or highly saline water.
- Question 2 of 5
2. Question
1 pointsSalinity is expressed as the amount of salt in grams dissolved in seawater per-
CorrectANSWER-1,000 gm
All waters in nature, whether rainwater or ocean water, contain dissolved mineral salts. Salinity is the term used to define the total content of dissolved salts in seawater. It is calculated as the amount of salt (in gm) dissolved in 1,000 gm (1 kg) of seawater. It is usually expressed as parts per thousand (o/oo) or ppt. Salinity is an important property of sea water. The salinity of 24.7 o/oo has been considered as the upper limit to demarcate ‘brackish water’.
IncorrectANSWER-1,000 gm
All waters in nature, whether rainwater or ocean water, contain dissolved mineral salts. Salinity is the term used to define the total content of dissolved salts in seawater. It is calculated as the amount of salt (in gm) dissolved in 1,000 gm (1 kg) of seawater. It is usually expressed as parts per thousand (o/oo) or ppt. Salinity is an important property of sea water. The salinity of 24.7 o/oo has been considered as the upper limit to demarcate ‘brackish water’.
- Question 3 of 5
3. Question
1 pointsWhich one of the following is the smallest ocean:-
CorrectANSWER- Arctic Ocean
The Arctic Ocean is located within the Arctic Circle and surrounds the North Pole. It is connected with the Pacific Ocean by a narrow stretch of shallow water known as Bering Strait. It is bound by northern coasts of North America and Eurasia.
IncorrectANSWER- Arctic Ocean
The Arctic Ocean is located within the Arctic Circle and surrounds the North Pole. It is connected with the Pacific Ocean by a narrow stretch of shallow water known as Bering Strait. It is bound by northern coasts of North America and Eurasia.
- Question 4 of 5
4. Question
1 pointsIdentify the element which is not a part of the hydrological cycle-
CorrectANSWER-Hydration
Salts in rocks expand due to thermal action, hydration and crystallisation. Many salts like calcium, sodium, magnesium, potassium and barium have a tendency to expand. Expansion of these salts depends on temperature and their thermal properties. High temperature ranges between 30 and 50oC of surface temperatures in deserts favour such salt expansion.
IncorrectANSWER-Hydration
Salts in rocks expand due to thermal action, hydration and crystallisation. Many salts like calcium, sodium, magnesium, potassium and barium have a tendency to expand. Expansion of these salts depends on temperature and their thermal properties. High temperature ranges between 30 and 50oC of surface temperatures in deserts favour such salt expansion.
- Question 5 of 5
5. Question
1 pointsThe average depth of continental slope varies between-
CorrectANSWER-200-2,000m
IncorrectANSWER-200-2,000m
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