Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q27 (IAS/2002) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Astronomy and astrophysics Answer Verified

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

Result
Your answer: —  Â·  Correct: A
Explanation

Option 1 is correct. Earth has the highest mean density among the planets (≈5.5 g/cm3) and is substantially denser than the Sun, whose average density is ≈1.408 g/cm3 — roughly one-quarter that of Earth [1]. Option 2 is incorrect: the terrestrial planets (including Earth) are dominated by silicate minerals and metals (magnesium, iron), not elemental silicon as the single predominant constituent. Option 3 is false because the Sun contains about 99.8–99.86% of the Solar System’s mass, not 75% [2]. Option 4 is also incorrect: the Sun’s diameter is about 109 times that of Earth, not 190 times [2].

Sources

  1. [1] https://phys.org/news/2015-09-sun.html
  2. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 2: The Solar System > 2.3. The Sun > p. 23
  3. [2] https://upload.wikimedia.org/wikipedia/commons/6/67/THE_SOLARE_SYSTEM_AND_ITS_DWARF_PLANETS.pdf
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
60%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CAPF · 2016 · Q49 Relevance score: 2.75

Which of the following statements relating to solar system is/are correct? 1. Venus and Uranus rotate opposite to the direction of rotation of Earth 2. Venus is the nearest planet to Earth Select the correct answer using the code given below:

CDS-II · 2023 · Q117 Relevance score: 1.93

Consider the following statements about some planets in the solar system: 1. Mercury has no atmosphere. 2. Venus has two moons. 3. There is no land on Jupiter. 4. Rings of Saturn are composed of lumps of ice and dust. Which of the statements given above are correct?

CAPF · 2012 · Q118 Relevance score: 1.00

Which one among the following statements is not correct?

IAS · 2025 · Q33 Relevance score: 0.90

Consider the following statements : Statement I : Scientific studies suggest that a shift is taking place in the Earth's rotation and axis. Statement II : Solar flares and associated coronal mass ejections bombarded the Earth's outermost atmosphere with tremendous amount of energy. Statement III : As the Earth's polar ice melts, the water tends to move towards the equator. Which one of the following is correct in respect of the above statements?

NDA-II · 2008 · Q13 Relevance score: 0.80

Which of the following statements i s/are correct with regard to Milky Way? 1. It is a spiral gal axy. 2. The solar system resides in one of its spiral arms. Select the correct, answer using the code given below :