Q4 of 11 Page 56

Explain how temperature affects the following.

the density of sea water

Sea water gets more dense as temperature goes down. So, the colder the water, the more dense it is. Increasing salinity also increases the density of sea water. Less dense water floats on top of more dense water. Near the freezing point, water expands when it heats up. Seawater too. So increasing temperature decrease the density of seawater.


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2

Give reason.

Salinity increases in the midlatitudinal zones.

 3

Answer the following questions.

A) What are the factors affecting the salinity of the sea water?


B) Explain the distribution of salinity around the Tropic of Cancer and tropic of Capricorn.


C) What are the factors affecting the temperature of the sea water?


D) Explain the changes occurring in the temperature of sea water according to the depth.


E) Name the factors affecting salinity.

 4

Explain how temperature affects the following.

the salinity of sea water

 1

Complete the table showing the salinity of open and land-locked seas.