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Question
Q. Consider the following statements with reference to interior of the Earth:
Which of the above statements is/are correct?
Q. Consider the following statements with reference to interior of the Earth:
Which of the above statements is/are correct?Open in App
Solution
The correct option is D
1, 2 and 3
Explanation:
Statement 1 is correct: There are three main sources of heat in the deep earth:
(1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements.
Statements 2 and 3 are correct: The outer layer is the earth crust –the lithosphere consists of 2 parts – the upper part consists of granitic rocks and forms the continents which comprises silica and alumina which have a density of 2.7.
The lower part consists of basaltic rocks and forms the oceans which comprises of silica, iron and magnesium which has average density of 3.0
1, 2 and 3
Explanation:
Statement 1 is correct: There are three main sources of heat in the deep earth:
(1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements.
Statements 2 and 3 are correct: The outer layer is the earth crust –the lithosphere consists of 2 parts – the upper part consists of granitic rocks and forms the continents which comprises silica and alumina which have a density of 2.7.
The lower part consists of basaltic rocks and forms the oceans which comprises of silica, iron and magnesium which has average density of 3.0
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