Question : Give a reasoned account of the distribution of salinity in the oceans and partially enclosed seas.
(1993)
Answer : Salinity refers to the total quantity (or concentration) of dissolved inorganic solids in water. It is defined as total amount of solid material in grams contained in one kilogram of sea water and is expressed as part per thousand (1‰).
The oceanic salinity not only affects the marine organisms and plant community but it also affects the physical properties of ocean water like temperature, density, currents etc. More saline water freezes slowly while less saline water ....
Question : Discuss the different bases for classifying the ocean deposits and give a detailed account of pelagic deposits of the oceans.
(2007)
Answer : The oceanic sub-system of earth is more diverse and complex than land sub-system. The occurrence and availability of deposits over ocean floor proves this beyond doubt. All the materials that accumulate on the ocean floor is known as Ocean deposits. The first method to classify the oceanic deposits on the basis of their origin was proposed by Sir John Murray and A.F. Renard in 1891. This classification proved to be very useful in understanding about ....
Question : Ocean currents of Northern Atlantic Ocean.
(2006)
Answer : Ocean currents of Northern Atlantic are as follows:
A. North Atlantic Ocean Warm Currents
Question : Present a concise account of bottom relief of the Indian Ocean.
(2003)
Answer : It is in the recent past that ocean have become an important focus of study. The study of the bottom relief of the ocean bodies have thrown considerable light in understanding the major geological processes and phenomena which helped in the evolution of the revolutionary theory of Plate Tectonics.
The surface beneath the water is characterised by a great diversity of relief features and the Indian Ocean is no exception to it. Indian Ocean is the ....
Question : Explain and illustrate the submarine relief of the Atlantic Ocean.
(1998)
Answer : The Atlantic Ocean located between North and South Americas in the West and Europe and Africa in the east, is the most widely studied ocean. It covers an area of 82 million square kilometer, which is about 1/6 th of the total area of the world. The shape of the ocean is very striking in the form of letter ”S” which Indicates, according to the theory of Plate Tectonics, that the contenents on either side ....
Question : Marine resources-biotic, mineral and energy resources.
(1997)
Answer : The wealth of sea is large. The sea is the store house of various important resources - biotic, mineral and energy resources. All the resources are not being utilised since we have limited expertise to utilise them on a cost-effective basis.
Question : Explain and illustrate the ocean floor topography and give a detailed account of the Mid-Atlantic Ridge.
(1996)
Answer : The study of the ocean floor topography has thrown valuable light in understanding the various geological processes and past geological events that have led to the formation of earth's crust and other associated features.
The surface beneath the ocean water is characterised by a great diversity of relief features, i.e. towering mountain chains, deep canyons, flat plains, trenches etc. Ocean floor topography has been classified following categories:
(1)Continental Shelves: The shallow submerged extension of continent is called ....
