GENERAL KNOWLEDGE

GK

WORLD GEOGRAPHY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the scientific theory about how Earth’s largest physical features are created?
A
softening of the mantle
B
collisions between landmasses
C
widening of continental shelves
D
erosion from mountain meltwater
Explanation: 

Detailed explanation-1: -Plate tectonics is a scientific theory that explains how major landforms are created as a result of Earth’s subterranean movements. The theory, which solidified in the 1960s, transformed the earth sciences by explaining many phenomena, including mountain building events, volcanoes, and earthquakes.

Detailed explanation-2: -Continental drift describes one of the earliest ways geologists thought continents moved over time. Today, the theory of continental drift has been replaced by the science of plate tectonics. The theory of continental drift is most associated with the scientist Alfred Wegener.

Detailed explanation-3: -Plate tectonics is the understanding that the top layer or lithosphere of the Earth’s crust is divided into many large rocky plates. These float on a layer of molten, liquid rock known as the asthenosphere.

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