Identify the correct statement pertaining to the Mid-Atlantic Ridge from the floor of Atlantic Ocean among the following :
Almost 3 km above
Almost 4 km above
Almost 5 km above
Almost 6 km above
A.
Almost 3 km above
Identify the correct statement regarding variation in density of ocean water and air at the same temperature :
Ocean water is 800 times more denser than air.
Ocean water is 600 times more denser than air.
Ocean water is 400 times more denser than air.
Ocean water is 200 times more denser than air.
The coral reefs that are generally found attached to the shore with an intervening shallow channel or a lagoon is called
Barrier reef
Patch reef
Ribbon reef
Fringing reef
Which one of the following is the main chemical composition of coral reefs ?
MgCO3 (Magnesium Carbonate)
KCO3 (Potassium Carbonate)
NaCl (Sodium Chloride)
CaCO3 (Calcium Carbonate)
Which one of the following countries is devoid of Glossopteris flora ?
India
Australia
Norway
South Africa
ASSERTION (A) : Coral reefs to be most extensively developed along the eastern edges of continents.
REASON (R) : Sea water is warmer than 20°C.
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true , but (R) is false.
(A) is false , but (R) is true.
The term "Swash" refers to :
Backward movement of sea water at the beach after the breaking of a wave.
Oblique movement of sea water at the beach after breaking of a wave.
Forward movement of sea water up the beach after the breaking of a wave.
Sideward movement of sea water up the beach after the breaking of a wave.
LIST I (Elements) |
LIST II (Density in gm/cm3) |
(a) Sea waves | (1) 2.4 |
(b) Oceanic crust | (2) 1.03 |
(c) Continental crust | (3) 2.8 |
(d) Continental margin | (4) 2.9 |
a-4 , b-2 , c-1, d-3
a-2 , b-4 , c-1 , d-3
a-2 , b-4 , c-3 , d-1
a-3 , b-4 , c-2 , d-1
LIST I (Sea configuration) |
LIST II (Deposits) |
(a) Sea bottom | (1) Hadalpelagic |
(b) Surface layer | (2) Pelagic province |
(c) Deep-sea trenches | (3) Benthic province |
(d) Sea-water column | (4) Epipelagic zone |
a-3 , b-4 , c-2 , d-1
a-3 , b-4 , c-1 , d-2
a-4 , b-3 , c-2 , d-1
a-1 , b-4 , c-2 , d-3