Why is Mars' surface red?
a) because little green men painted it that way
b) because its surface is mostly made of lava ejected from its giant volcanos
c) because there is more ammonia than methane on the surface of Mars, unlike on the Jovianplanets Uranus and Neptune
d) because the soil is iron rich and the iron reacted with oxygen in the early atmosphereto make rust
e) because the carbon dioxide rain strikes the surface and reacts
Ans: d) because the soil is iron rich and the iron reacted with oxygen in the early atmosphereto make rust
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