Which one of the following statements is correct with reference to our solar system?
A
The Earth is the densest of all the planets in our solar system
B
The predominant element in the composition of Earth is silicon
C
The Sun contains 75 per cent of the mass of the solar system
D
The diameter of the Sun is 190 times that of the Earth
Correct Answer: Option A
Explanation
1. Statement A is correct. Earth has the highest density among all the planets in our solar system, with an average density of about 5.51 grams per cubic centimeter.
2. Statement B is incorrect. The predominant element in the composition of Earth as a whole is iron (about 32%), followed by oxygen (30%), silicon (15%), and magnesium (14%). Oxygen is the most abundant element in the Earth's crust, followed by silicon.
3. Statement C is incorrect. The Sun contains about 99.86% of the total mass of the solar system, not 75%.
4. Statement D is incorrect. The diameter of the Sun is about 109 times that of the Earth, not 190 times.