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Distribution of Oceans and Continents Class 11 MCQs Questions with Answers
I. Choose the correct answer
Question 1.
Wegner’s theory was proposed in
(a) 1912
(b) 1755
(c) 1862
(d) none of them
Answer
Answer: (a) 1912.
Question 2.
The super-continent from which all landmasses of the world have formed is
(a) Volcanoes
(b) Pangaea
(c) Continents
(d) Oceans
Answer
Answer: (b) Pangaea.
Question 3.
The volcanic centres are called
(a) volcanoes
(b) hotspots
(c) crustal plates
(d) none of them
Answer
Answer: (b) hot spots.
Question 4.
Periodical change in the position of magnetic pole is
(a) Polar wandering
(b) Subduction
(c) Geological process
(d) none of them
Answer
Answer: (a) Polar wandering.
Question 5.
The process in which one plate over-rides the other and the over-riden plate slips down into the mantle and is absorbed is called
(a) Subduction
(b) Abduction
(c) Polar wandering
(d) Geological process
Answer
Answer: (a) Subduction.
Question 6.
The northern continent broken from pangaea is
(a) Laurasia
(b) Pacific plate
(c) Pangaea
(d) none of them
Answer
Answer: (a) Laurasia.
Question 7.
The southern continent broken from pangaea is
(a) Laurasia
(b) Gondwanaland
(c) Pacific ocean
(d) none of them
Answer
Answer: (b) Gondwanaland.
Question 8.
Who presented a map using computer programme to find best fit of Atlantic margin?
(a) Alfred Wegner
(b) Bullard
(c) Abraham Ortelius
(d) Antonio
Answer
Answer: (b) Bullard.
Question 9.
The earliest marine deposits along the coastline of either S.America or Africa are of
(a) Jurassic age
(b) Pangaea
(c) Laurasia
(d) Gondwanaland
Answer
Answer: (a) Jurassic age.
Question 10.
Rich placer deposits of gold occur in
(a) Australia
(b) America
(c) Madagascar
(d) Ghana coast
Answer
Answer: (d) Ghana coast.
Question 11.
Which one is the force for drifting?
(a) Pole fleeing
(b) Tidal
(c) both of them
(d) none of them
Answer
Answer: (c) both of them.
Question 12.
When was the possibility of convection currents in the mantle portion discussed?
(a) 1912
(b) 1596
(c) 1950
(d) 1956
Answer
Answer: (c) 1950.
Question 13.
The ocean floor may be divided into how many divisions?
(a) 3
(b) 2
(c) 4
(d) 6
Answer
Answer: (a) 3.
Question 14.
Which one is the major division based on the depth as well as on the forms of relief?
(a) Continental margins
(b) Deep sea basins
(c) Mid-ocean ridges
(d) all of them
Answer
Answer: (d) all of them.
Question 15.
Which division lies between continental shores and deep sea basins?
(a) Continental margin
(b) Deep sea basin
(c) none of these
(d) both of these
Answer
Answer: (a) Continental margin.
Question 16.
The second group of deep sea basin lying between the continental margins and mid-ocean ridges is known as
(a) Continental margin
(b) Abyssal plains
(c) Gondwanaland
(d) Mid-ocean ridges
Answer
Answer: (b) Abyssal plains.
Question 17.
An interconnected chain of mountain system is formed by
(a) Mid-oceanic ridges
(b) Abyssal plains
(c) Continental margin
(d) none of them
Answer
Answer: (a) Mid-oceanic ridges.
Question 18.
Who collected the ideas about plate tectonics?
(a) Mackenzie
(b) Parker
(c) Morgan
(d) all of them
Answer
Answer: (d) all of them
Question 19.
A plate is a portion of
(a) Lithosphere
(b) Asthenosphere
(c) Oceans
(d) none of them
Answer
Answer: (a) Lithosphere.
Question 20.
The earth’s lithosphere is divided into major plates:
(a) 6
(b) 8
(c) 3
(d) 2
Answer
Answer: (a) 6.
Question 21.
Which one is the minor plate?
(a) Arabian
(b) Fuji plate
(c) Cocos
(d) all of them
Answer
Answer: (d) all of them.
Question 22.
The spreading boundaries are termed as
(a) Constructive
(b) Accerting
(c) Diverging
(d) all of them
Answer
Answer: (d) all of them
Question 23.
The collision boundaries are the result of
(a) subduction
(b) Collision
(c) transform
(d) spreading
Answer
Answer: (b) Collision.
Question 24.
How many types of forces work on a moving plate?
(a) two
(b) three
(c) five
(d) four
Answer
Answer: (a) two
Question 25.
The driving force includes
(a) ridge push
(b) basal drive
(c) slab pull
(d) all of them
Answer
Answer: (d) all of them.
II. Fill up the blanks with suitable words
Question 1.
In 1912, Alfred Wegner put forth the ………………
Answer
Answer: continental drift theory
Question 2.
All the continents formed a single continental mass ………………
Answer
Answer: Protocontinent
Question 3.
The protocontinent mass was named …………….
Answer
Answer: Pangaea
Question 4.
Pangaea broke into …………… and ……………
Answer
Answer: Laurasia, Gondwanaland
Question 5.
……………. are the sedimentary rocks formed out of deposits of glaciers.
Answer
Answer: Tillite
Question 6.
……………. was a small reptile who adapted to shallow brackish water.
Answer
Answer: Mesosaurus
Question 7.
………………. and tidal force are the two forces for drifting.
Answer
Answer: Pole fleeing
Question 8.
The second group of deep sea basins lie between the ………………. and …………….
Answer
Answer: continental margin, ridges
Question 9.
……………. forms an interconnected chain of mountain system ridges.
Answer
Answer: Mid-oceanic ridge
Question 10.
The study of the magnetic properties of the earth and that of rocks is known as ………………
Answer
Answer: palaeomagnetism
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