What is the average concentration of ozone in the Earth's atmosphere?

What is the average concentration of ozone in the Earth's atmosphere?

• A. 0.1 parts per million
• B. 0.3 parts per million
• C. 0.5 parts per million
• D. 0.8 parts per million

Answer: (B)

The average concentration of ozone in the Earth's atmosphere is approximately 0.3 parts per million (ppm). This concentration is significant because it highlights the role of ozone in the stratosphere, where it forms the ozone layer that protects life on Earth from harmful ultraviolet (UV) radiation. The ozone layer acts as a shield, absorbing most of the sun's harmful UV rays. Although this concentration can vary slightly depending on geographical location and atmospheric conditions, 0.3 ppm is a widely accepted average that reflects key scientific findings about ozone distribution in the atmosphere.

The average concentration of ozone in the Earth's atmosphere is approximately 0.3 parts per million (ppm). This concentration is significant because it highlights the role of ozone in the stratosphere, where it forms the ozone layer that protects life on Earth from harmful ultraviolet (UV) radiation. The ozone layer acts as a shield, absorbing most of the sun's harmful UV rays. Although this concentration can vary slightly depending on geographical location and atmospheric conditions, 0.3 ppm is a widely accepted average that reflects key scientific findings about ozone distribution in the atmosphere.