Cadet Competition Written Practice Exam

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Prepare for the Cadet Competition Written Exam. Dive into challenging multiple-choice questions with comprehensive hints and explanations. Ace your cadet test with confidence and excel in your journey to becoming a top cadet!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

How long does it take Neptune to complete an orbit of the Sun?

75 years
100 years
165 years
200 years

The correct answer is: 165 years

Neptune takes approximately 165 years to complete one full orbit around the Sun. This long orbital period is due to its great distance from the Sun, as Neptune is the eighth planet in the solar system and is significantly farther out compared to the inner planets. The time taken for a planet to orbit the Sun is influenced by its distance from the Sun, following Kepler's laws of planetary motion, which state that the farther a planet is from the Sun, the longer it takes to complete its orbit. The other options do not accurately reflect the actual orbital period of Neptune. For instance, while 75 years is shorter than its actual orbital period, 100 years and 200 years extend beyond its true time frame, making 165 years the most accurate choice in this context.