Solar System quiz

More questions about Solar System

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   Why did no major planet form in the Asteroid Belt?

   Answer: Jupiter's gravitational influence disrupted material from clumping

   Why: Despite sprawling across millions of kilometers, all asteroids in the main belt combined equal less than four percent of Earth's Moon.

2. 2 Medium

   On which planet does a single spin on its axis last longer than its whole year?

   Answer: Venus

   Why: Sunrise to sunrise still takes only about 117 Earth days there, because the backwards spin works against the orbit.

3. 3 Hard

   Which moon is so large it causes Pluto to wobble?

   Answer: Charon

   Why: About half of Pluto's width, it is the largest moon relative to its parent, and the pair circles a balance point out above Pluto's surface.

4. 4 Easy

   Which planet has the shortest year?

   Answer: Mercury

   Why: Mercury's year lasts 88 Earth days, but one sunrise to the next takes 176, so a single Mercury day spans two Mercury years.

5. 5 Medium

   Why does Mercury experience the most extreme temperature swings?

   Answer: Lack of atmosphere

   Why: Daytime highs near 430 degrees Celsius drop to about minus 180 at night, the widest range of any planet, yet ice survives in sunless polar craters.

6. 6 Hard

   Which sound was included on the Voyager Golden Record?

   Answer: Whale songs

   Why: Humpback songs taped by biologist Roger Payne share one track with the United Nations greetings, so whale and human voices ride out together.