Ozone at the higher level of the atmosphere is a product of ______ acting on oxygen molecules.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. UV radiation.
Ozone at the higher level of the atmosphere is a product of ultraviolet (UV) radiation acting on oxygen molecules (O₂). In the stratosphere, UV rays break oxygen molecules into individual oxygen atoms, which then combine with O₂ to form ozone (O₃). This process, called the ozone-oxygen cycle, forms the ozone layer, which protects Earth from harmful UV radiation. The presence of this layer is crucial for maintaining life by reducing the risk of skin cancer, cataracts, and ecological damage.