Which planet is the closest to the Sun?

Prepare for the Pre-IB Grade 9 Science Exam with detailed flashcards and multiple-choice questions. Each question is paired with hints and thorough explanations. Ace your test with confidence!

Multiple Choice

Which planet is the closest to the Sun?

Explanation:
The idea tested here is how the planets are arranged by their distance from the Sun. Mercury sits closest to the Sun, occupying the smallest orbit of all the planets, about 0.39 astronomical units away. That means it is nearer to the Sun than any other planet, which is why it’s the correct answer. The next planets are farther out: Venus at about 0.72 AU, Earth at 1 AU, and Mars around 1.5 AU. Mercury’s proximity also explains its rapid orbit and extreme temperature variations, since it receives the most solar energy per area despite its small size.

The idea tested here is how the planets are arranged by their distance from the Sun. Mercury sits closest to the Sun, occupying the smallest orbit of all the planets, about 0.39 astronomical units away. That means it is nearer to the Sun than any other planet, which is why it’s the correct answer. The next planets are farther out: Venus at about 0.72 AU, Earth at 1 AU, and Mars around 1.5 AU. Mercury’s proximity also explains its rapid orbit and extreme temperature variations, since it receives the most solar energy per area despite its small size.

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