Which one of the following statements is correct with reference to our solar system?
- AThe Earth is the densest of all the planets in our solar systemCorrect
- BThe predominant element in the composition of Earth is silicon
- CThe Sun contains 75 per cent of the mass of the solar system
- 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.
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