Question : What is the average thickness of the continental crust of the Earth?
Option 1: 300 km
Option 2: 5 km
Option 3: 30 km
Option 4: 2.5 km
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Correct Answer: 30 km
Solution : The correct answer is 30 km .
The thickness of the continental crust is 30 km. It varies from place to place. The highest thickness of continental crust is on the Tibetan plateau. The continental crust is granitic and made up of SIAL (silica and aluminium).
The continental crust is primarily composed of lighter, less dense rocks, such as granite and sedimentary rocks. These rocks are rich in silica and aluminium. The continental crust forms the continents, which are characterised by diverse topography, including mountains, plains, plateaus, and valleys.
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