Geography
Assertion (A): Sial appears to float above Sima.
Reason (R): Sial has lower density than Sima.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R does not explain A.
- A is true but R is false.
- A is false but R is true.
Earth's Structure
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — The name Sial is taken from Silica (Si) and Aluminium (Al). Sima is named after Silica (Si) and Magnesium (Mg). Sial appears to float above Sima because it has lower density than Sima.
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Related Questions
Study the figure on the right and complete the analogy:
Continents : SIAL :: …………… : SIMA
- Mountains tops
- Ocean floor
- Plains
- Volcanoes
This is the densest part of the earth believed to be composed of iron and nickel which is responsible for earth's magnetism. Identify it.
- Mantle
- Core
- Crust
- None of the above
Which of the following is the correct order as we move towards the interior of the earth.
- SIAL - SIMA - NIFE
- NIFE - SIMA - SIAL
- NIFE - SIAL - SIMA
- None of the above.
Which of the following is incorrect about the inner core?
- It is in a molten state.
- It is a region of high density.
- It is a region of high pressure.
- It is composed of iron and nickel.