UPSC Prelims 2002·GS1·geography·general geography

Which one of the following statements is correct with reference to our solar system?

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  1. AThe Earth is the densest of all the planets in our solar systemCorrect
  2. BThe predominant element in the composition of Earth is silicon
  3. CThe Sun contains 75 per cent of the mass of the solar system
  4. DThe diameter of the Sun is 190 times that of the Earth

Explanation

The correct answer is A because Earth has the highest average density of all the planets in our solar system, with a value of approximately 5.51 grams per cubic centimeter. Statement B is incorrect because iron, not silicon, is the predominant element in the overall composition of Earth by mass. Statement C is incorrect because the Sun is much more massive, containing about 99.8 per cent of the total mass of the solar system. Statement D is incorrect because the diameter of the Sun is approximately 109 times that of the Earth, not 190 times.
geography: Which one of the following statements is correct with reference to our solar system?

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