Question

The two forms of oxygen found in the atmosphere are:

• A. Water and ozone
• B. Water and oxygen
• C. Ozone and oxygen
• D. water and carbon dioxide

Answer 1

The correct option is C

Ozone and oxygen

The correct answer is option C: Ozone and oxygen

Explanation of the correct answer:

1. Oxygen exists in two molecular forms.
2. Three oxygen atoms combine under UV rays to form ozone.
3. Ozone forms 0.00006% of the atmosphere that constitutes roughly 3 billion metric tons.
4. Oxygen forms 21% of the atmosphere and exists as dissolved oxygen, various forms of precipitation, and in other forms on Earth.
5. Thus, oxygen and ozone are the two forms of oxygen found in the atmosphere.

The final answer is option C.