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प्रश्न
The continents are placed above the oceans.
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उत्तर
The density of continents is lesser than the layer supporting the ocean beds, so the continents came floating upwards at the time of the formation and solidification of the earth, as the lighter things come upwards floating over the heavier things i. e. Sial is lighter than Sima
संबंधित प्रश्न
What is the lithosphere?
State two chief characteristics of the earth’s crust.
Where is asthenosphere found?
Look at the figure on the side and answer the question:
Label the parts: (1), (2), (3), (4) and (5).
Study the figure on the side and answer the question
What is known as Sial? How deep is the area marked by Sial?
“The whole of the approaching ship is not visible at one time.” Why?
Give two reasons why tremors occur inside the earth?
Consider the given statement:
- The thickness of the crust is greater below the continents than the ocean’s floor.
- All terrestrial planets have a lithosphere.
- The core is composed of Silica and Aluminium.
Which of the statement (s) is/are true?
Give reason for the following:
Generation of the Earth’s Magnetic field.
Consider the given statement
- When magnia reaches this Earth’s surface, it is referred to as ‘Lava’.
- The interior of the earth contains very hot molten material called ‘Magma’.
- Sedimentary are also called Primary (or) Mother rocks.
