If all the ozone were compressed to sea level, how thick would it be?

• A. 1mm to 2mm
• B. 2mm to 3mm
• C. 4mm to 5mm
• D. 5mm to 6mm

Answer: (B)

The thickness of the ozone layer, if compressed to sea level, is estimated to be between 2mm and 3mm. This thickness reflects the relatively small volume of ozone present in the upper atmosphere when compared to other atmospheric gases. The ozone layer is concentrated primarily in the stratosphere, where it plays a crucial role in protecting life on Earth by absorbing the majority of the sun's harmful ultraviolet radiation.

This estimate takes into account the total amount of ozone in the atmosphere, considering its distribution and concentration at various altitudes. While the ozone layer appears extensive in terms of area, its actual mass is not substantial enough to result in a thicker layer when compressed. Hence, the correct answer accurately reflects the scientific understanding of ozone's distribution in the atmosphere.