Smarty Pants Quiz
What element composes the largest part of Earth's atmosphere?
Earth's atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with very small percentages of other elements.
Wow, you're so smart! Try this!
09
00
00
What element composes the largest part of Earth's atmosphere?
6 of 10 people (60%) answered
this question correctly.
0 of 54 questions completed