Social Science : Geography
HYDROSPHERE
1. The temperature of the ocean
waters generally________ at greater depth.
a)
increases
b) decreases
c)
remains constant
d)
none of the above
Answer : b)
decreases
2. Ocean currents are produced
due to
a)
due to rotation of earth
b)
due to variation in temperature
c)
due to earth's movement
d) all the above
Answer : d) all the
above
3. Consider the following
statements.
1. Most of the fishing grounds
occur in areas where the continental shelf is wide.
2. Fishing is well developed in
warm tropical waters.
3. Mixing of Warm and cold
currents facilitates plant nutrients for fish.
4. Inland fishing became
significant in India.
a)
1 and 2 are correct.
b) 1 and 3 are correct.
c)
2,3 and 4 are correct.
d)
1,2 and 3 are correct
Answer : b) 1 and 3
are correct
4. The oceanic ridge comes into
existence due to
a)
convergence of tectonic plates
b) divergence of tectonic plates
c)
lateral movements of plates
d)
stearing of plates
Answer: b) divergence of tectonic plates
5. Which of the following
indicates the correct sequence of the topography beneath the surface of the
sea?
a) Continental shelf-Continental
slope-Sea plain-Sea trench.
b)
Continental slope-Continental shelf-Sea plain-Sea trench.
c)
Sea plain-Continental slope-Continental shelf-Sea trench.
d)
Continental slope-Sea plain-Continental shelf-Sea trench.
Answer : a)
Continental shelf-Continental slope-Sea plain-Sea trench
6. Which of the following is not
correctly matched?
a) Gulf Stream — Pacific Ocean
b)
Labrador current— North Atlantic Ocean
c)
Canary current—Mediterranean sea.
d)
Mozambique current — Indian Ocean
Answer : a) Gulf
Stream-Pacific Ocean
Directions:
A)
Both A and R are correct and R explains A.
B)
Bothe A and R are correct but R does not explain A.
C)
A is correct but R is false.
D)
A is false but R is correct.
1. Assertion (A) : Oceans
are always shown in blue in maps.
Reason(R) : It
indicates the natural colour of the oceans.
A) Both A and R are correct and R
explains A.
B)
Bothe A and R are correct but R does not explain A.
C)
A is correct but R is false.
D)
A is false but R is correct.
Answer : A) both A
and R are correct and R explains A
2. Assertion (A) : Flat
topped seamounts are known as Guyots.
Reason (R) : All
guyot features are of volcanic origin.
A) Both A and R are correct and R
explains A.
B)
Bothe A and R are correct but R does not explain A.
C)
A is correct but R is false.
D)
A is false but R is correct.
Answer : A) both A
and R are correct and R explains A
3. Assertion(A) :
Submarine canyons are deep gorges on the ocean floor.
Reason(R) : They are
mainly restricted to continental shelf, slope and rise
A) Both A and R are correct and R
explains A.
B)
Bothe A and R are correct but R does not explain A.
C)
A is correct but R is false.
D)
A is false but R is correct.
Answer : A) both A
and R are correct and R explains A
4. Assertion (A) : Atolls
are more common in the Atlantic ocean.
Reason (R) : The
marine population at the depth is less.
A)
Both A and R are correct and R explains A.
B)
Bothe A and R are correct but R does not explain A.
C) A is correct but R is false.
D)
A is false but R is correct.
Ans (c) A is
correct but R is false
1.
Mariana trench – a. Decreases salinity in the oceans
2.
Great Barrier Reef - b. Along the coast of Japan
3.
Spring tides – c. Deepest point in the Pacific
4.
Heavy rains – d. Australia
5.
Kuroshio current – e. Second order land form
6.
Continental slope - f. On full and new moon days
Answers
1. Mariana trench – Deepest
point in the Pacific
2. Great Barrier Reef - Australia
3. Spring tides – On full
and new moon days
4. Heavy rains – Decreases
salinity in the oceans
5. Kuroshio current – Along
the coast of Japan
6. Continental slope - Second
order land form
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