Importance of Oceans

Oceans are important for which of the following reasons?

(Tick 4 correct options).

• _{Ocean gives carbon di oxide}

• _{Oceans give us SALT, MARINE ANIMALS and MINERALS}

• _{Oceans affect climate}

• _{Oceans are the source of RAIN}

• _{Oceans are an important means of transport.}

Which of these reasons cause the Ocean water to be salty?

(Tick 3 correct options).

• Dead remains of aquatic animals

• Mixing of SEDIMENTS because of RAINWATER

• Cutting of trees

• Oil spills

• Underwater Volcanic eruptions

Salinity means _________

• SALTINESS or the amount of salt present in a water body

• the amount of carbon di oxide in air

• salt pans

Salinity is expressed in terms of _______.

• centimetre

• litres

• mills

• kg

• inches

IMP QUESTION :

Out of the Total water on earth, ________% is contained in the oceans.

• 2%

• 70%

• 6%

• 97.7%

IMPORTANT QUESTION

The average salinity of ocean water is ______.

• 3 o/oo (3 mills)

• 35 o/oo (35 mills)

IMPORTANT QUESTION

DEAD SEA is known to have the MAXIMUM salinity. How much is it?

• 35 º/oo (35 mills)

• 67 º/oo (67 mills)

• 250 º/oo (250 mills)

• 332 º/oo (332 mills)

IMPORTANT QUESTION

(a)   substance is obtained by constructing salt pans.

IMPORTANT QUESTION

Winds that blow due to pressure difference in the belts, throughout the planet are called ______________.

• Oceanic winds

• Planetary winds

• Monsoon winds

IMPORTANT QUESTION

Regions that are closed to the oceans have __________ climate.

• very hot

• very cold

• EQUABLE

• high temperature

• low temperature