WorksheetsImportance of Oceans
Total questions: 16
Worksheet time: 10mins
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
Which region receives perpendicular or direct and too much sunlight ?
North poles
Equator
South poles
The beginning and end of water cycle takes place in the oceans.
True
False
We get natural gas and mineral oil from the Oceans.
True
False
Choose all the precious and useful items we obtain from the oceans.
(Tick three correct answers)
diamond
pearls and corals
gold and silver
medicinal plants
shells
Water transport takes place on a much larger scale as compared to other modes of transport.
True
False
Choose all the correct reasons that are responsible for pollution of oceanic waters.
Waste thrown from ships, industries & cities
Traffic on roads
Oil spills
Exploitative (too much) fishing
Cutting of mangrove forests in coastal areas
