Question

quiz
question 1 of 10
which of the following is true of nitrogen?
choose one option
a it’s the most abundant element in the atmosphere.
b it’s sequestered deep underground for centuries.
c it’s a greenhouse gas.
d it’s taken up during respiration.

Explanation:

• Option A: The atmosphere is about 78% nitrogen, making it the most abundant element in the atmosphere.
• Option B: Elements like carbon (in fossil fuels) are sequestered underground, not nitrogen in that way.
• Option C: Greenhouse gases are like CO₂, CH₄, etc. Nitrogen gas (N₂) is not a greenhouse gas.
• Option D: Respiration uses O₂ and produces CO₂; nitrogen is not taken up during respiration.

Answer:

A. It's the most abundant element in the atmosphere.