Ocean Water

 

 Ocean 

 

 

 

 

 

 

 

These salts have entered the oceans following

their weathering from rocks on land.

The dissolved salts are carried to the sea by rivers.

why don't the proportions of salts build up over time?

This is explained by chemical precipitation

As new salts enter the sea, other salts are being deposited

on the ocean floor as solids.

Equilibrium has been reached.

The oceans also contain dissolved gases. These come

from volcanic activity on the sea bed and from the gases in the air.

The oceans play an important part in the carbon cycle as reservoirs for carbon dioxide.

The carbon dioxide can form hydrogen carbonates which are soluble in the sea water.

 

 

Assessment

 

1.   New salts enter the sea, other salts are being deposited

        on the ------------------ floor as solids.

A.  Car

B.  ocean

C. Mobile

 

2.   Oceans also contain dissolved --------------------.

A.  oxygen

B.  carbon

C. gases

 

3.   ------------------------ is the changing of a liquid into a gas.

A.  Evaporation  

B.  Condensation

C. Precipitation

 

4.   ------------------------ is the changing of a gas into a liquid.

A.  Evaporation 

B.  Condensation

C. Precipitation

 

 

5.   A --------------------------- is an area from which water is drained.

A.  Evaporation 

B.  watershed

C. Precipitation

 

 

1.   Salts have entered the oceans following their weathering from rocks on land.

A.  True

B.  False

 

2.   The dissolved salts are carried to the sea by rivers.

A.  True

B.  False

3.   Precipitation that flows across the land's surface and is absorbed will flow into rivers, lakes, and streams as runoff.

A.  True

B.  False

 

4.   The oceans play an important part in the carbon cycle as reservoirs for carbon dioxide.

A.  True

B.  False