Physical Geography - Hydrosphere - MCQs with answers - Part I
1. The seaward extension of the continent from shoreline to the continental edge is calleda. Continental rise
b. Continental slope
c. Continental shelf
d. None of the above
View Answer / Hide AnswerANSWER: c. Continental shelf
The seaward extension of the continent from shoreline to the continental edge is called the continental shelf. Because of the shallowness of the shelf, there is extensive growth of minute plants and microscopic organisms.
a. Continental rise
b. Continental slope
c. Continental shelf
d. None of the above
View Answer / Hide AnswerANSWER: b. Continental slope
Continental slope marks the seaward limit of the continental block. The abrupt change of gradient at the edge of the continental shift leads to the formation of a continental slope.
a. Abyssal plain
b. Structural plain
c. Saturated plain
d. None of the above
View Answer / Hide AnswerANSWER: a. Abyssal plain
The undulating plain lying beyond the continental rise is called the abyssal plain. This plain covers two-thirds of the ocean floor.
a. Challenger deep
b. Richards deep
c. Java trench
d. Yap trench
View Answer / Hide AnswerANSWER: a. Challenger deep
Challenger deep is located in the Mariana trench near the Guam island. It is the greatest known ocean deep. It is approximately 36000+ feet deep.
i. Hypolimnium layer represents vertical zone of ocean water.
ii. Thermocline layer witnesses rapid rate of increase in temperature with increasing depth.
a. i only
b. ii only
c. both
d. none
View Answer / Hide AnswerANSWER: d. none
Thermocline layer represents the vertical zone of ocean water. This layer witnesses rapid rate of decrease in temperature with increasing depth.
i. The top most layer of ocean water is called the thermocline layer.
ii. The highest salinity in water is found in the Lake Van
A) i only
B) ii only
C) Both
D) None
View Answer / Hide AnswerANSWER: B) ii only
The top most layer of ocean water is called the epilimnion layer. The highest salinity in water is found in the Lake Van. It is around 330%o
i. The temperature increases according to the increasing depth of the ocean.
ii. The temperature gradually increases from equator towards the poles.
A) i only
B) ii only
C) Both
D) None
View Answer / Hide AnswerANSWER: D) None
The general temperature of the ocean surface water is 26.7 degree celcius. The temperature decreases according to the increasing depth of the ocean. The temperature gradually decreases from equator towards the poles.
i) The surface temperature of the seas increases from equator towards the poles.
ii) The temperature at the ocean bottom varies from equator towards the pole.
A) i only
B) ii only
C) Both
D) None
View Answer / Hide AnswerANSWER: D)None.
The surface temperature of the seas decreases from the equator towards the poles. The temperature at the ocean bottom is generally uniform from the equator towards the pole.
i. Euphotic zone do not receive solar rays.
ii. Aphotic zone receives solar radiation.
A)i only
B)ii only
C)Both
D)None
View Answer / Hide AnswerANSWER: D)None
Euphotic zone also known as photic zone denotes the upper surface of the ocean and extends up to the depth of 200m.It receives solar rays whereas aphotic zone extends from 200m bottom doesn't
i. In northern hemisphere ocean currents move to their left.
ii. In southern hemisphere ocean currents move to their right.
A) i only
B) ii only
C) Both
D) None.
View Answer / Hide AnswerANSWER: D) None.
In southern hemisphere ocean currents move to their left and in the northern hemisphere, ocean currents move to their right. An exception is the Northern Indian Ocean. There currents change direction according to reversal of monsoon winds.
