Praxis 5005 Practice Test Practice Question
Of the following, which is most likely to be composed primarily of ice?
Correct Answer: C
Rationale: Comets are primarily composed of ice, dust, and rocky material, earning them the nickname "dirty snowballs." Their icy nuclei become prominent when they approach the Sun, creating visible tails.
In contrast, asteroids (Option A) are mainly rocky or metallic and lack the significant ice content found in comets. Red dwarfs (Option B) are small, cool stars composed of gas, not ice. The planet Mercury (Option D) has a rocky surface and very little ice, primarily due to its proximity to the Sun. Thus, while asteroids, red dwarfs, and Mercury lack the icy composition of comets, only comets are predominantly made of ice.
Unlock All Questions
Subscribe to Premium for full access to all practice questions, detailed rationales, and performance tracking.
Subscribe Now