24
QuizMultiple Choice

Beyond the Solar System — Test

Question 24 • Earth and Space Science

Which statement best explains the observed pattern in planetary composition?

Answer
A
The composition of planets is random and does not follow a predictable pattern.
B
Planets farther from the star are mainly composed of frozen gases because they form in the coldest regions, where volatile compounds can condense.
C
Icy planets form close to the star because they require high temperatures to remain in their solid state.
D
Planets closer to the star are mainly composed of hydrogen and helium because high temperatures prevent rock and metal formation.

Explanation

Farther from a star, temperatures are lower, so volatile substances such as water, methane, and ammonia can freeze and become part of forming planets. This explains why distant planets tend to contain more ices and frozen gases. Icy planets do not need high temperatures to stay solid, so choice A reverses the relationship.

AI-written and checked against the verified answer.

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