Multiple choice

The protective-ozone layer is present in

  1. ionosphere

  2. stratosphere

  3. troposphere

  4. lithosphere

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The ozone layer, which absorbs harmful UV radiation from the sun, is located in the stratosphere (approximately 10-50 km altitude). The troposphere is where we live and weather occurs, the ionosphere is much higher, and the lithosphere is Earth's crust.