Mars quiz

More questions about Mars

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

1. 1 Easy

   Why would future Mars explorers likely live in underground lava tubes?

   Answer: Protection from radiation

   Why: Tests inside terrestrial lava tubes found 82 percent less radiation, enough to cut a Mars crew's daily dose from about 342 to 62 microsieverts.

2. 2 Medium

   Why are the moons of Mars often thought to be captured asteroids?

   Answer: Their irregular shapes

   Why: Their near-circular orbits over the equator argue the other way, and a Japanese sample-return mission is being sent to settle it.

3. 3 Hard

   What geological event most likely formed the Valles Marineris canyon system?

   Answer: Tectonic crust pulling

   Why: Faults dropped long blocks of crust about 3.5 billion years ago, and wall collapses have since sent debris running over 100 kilometres.

4. 4 Easy

   Who wrote the 1950 book The Martian Chronicles?

   Answer: Ray Bradbury

   Why: The book combines separate short stories into a single narrative tracking humanity's arrival on Mars.

5. 5 Medium

   Which NASA spacecraft confirmed water ice just below Martian soil in 2008?

   Answer: Phoenix

   Why: Phoenix scraped away surface dirt near Mars's north pole and watched bright ice patches vaporize.

6. 6 Hard

   What mineral structures in meteorite ALH84001 suggested Martian life?

   Answer: Magnetite chains

   Why: In 2001 imaging showed bacteria-like magnetite chains, but 2004 magnetic tests found most or all crystals are not in chains.