AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/aero-mars-red-rust

Why does Mars look red?

Start playing free

  1. Red clouds cover its surface
  2. Frozen carbon dioxide coats the ground
  3. Iron minerals in its dirt have rusted

🔒 The answer is for AhaBulb members. Members see the answer, why it's right and the official sources for every card of Stuff Every CAP Aerospace Cadet Should Know, plus timed practice exams.

The first 50 cards of every test are free to play.

Play the free cards See membership

Like this card?
Play the game

References

  1. NASA Science: Mars Facts science.nasa.gov/mars/facts Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

AerospaceUnder the 2006 IAU rules, what must a planet do that a dwarf planet has not done?AerospaceIn what year was Pluto reclassified as a dwarf planet?AerospaceWhich planet is both the smallest and the closest to the Sun?

That's stuff everyone should know.