ashybear99 ashybear99

14-10-2019
Biology

contestada

Which of the following elements makes up the smallest percentage of the atmosphere?
A.Oxygen
B. Nitrogen
C. Carbon dioxide

Respuesta :

howlingwateremma1098 howlingwateremma1098

14-10-2019

Answer: A

Explanation:

Oxygen makes up another 20 to 21 percent of our atmosphere. It's essential for life on Earth, and interestingly enough, it is poisonous when highly concentrated. Our concentration of 20 to 21 percent seems just right.

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Аноним Аноним

15-10-2019

Answer:

c: Carbon Dioxide

Explanation:

Earth's atmosphere is mainly made up of:

78% nitrogen

21% oxygen

0.03% carbon dioxide

And smaller percentages of other elements. Therefore, out of the options, the answer is carbon dioxide

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