Multiple choice general knowledge science & technology

Planet Mars appears red due to the presence of

  1. Sodium

  2. Sodium oxide

  3. Iron

  4. Iron oxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mars appears red because its surface is covered with iron oxide (rust), which gives the planet its characteristic reddish-orange color. This iron-rich dust and rock material has been oxidized over billions of years, creating the distinctive red hue visible from Earth.

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