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Multiple choice question.

Salinity is expressed as the amount of salt in grams dissolved in sea water per


Salinity is used to measure the amount of salt present in water, and is expressed as the weight of salt, in grams, dissolved in every 1000 grams of water.

Other options are factually incorrect.

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1

Multiple choice question.

The average depth of continental slope varies between


 1

Multiple choice question.

Which one of the following is not a minor relief feature in the oceans:


 1

Multiple choice question.

Which one of the following is the smallest ocean:


 2

Answer the following questions in about 30 words.

(i) Why do we call the earth a Blue Planet?


(ii) What is a continental margin?


(iii) List out the deepest trenches of various oceans.


(iv)What is a thermocline?


(v) When you move into the ocean what thermal layers would you encounter?


Why the temperature varies with depth?


(vi) What is salinity of sea water?