Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Ozone refers to a molecule made up of three oxygen atoms (O3) that is found in the Earth's atmosphere. It plays a crucial role in protecting life on Earth by absorbing most of the Sun's harmful ultraviolet (UV) radiation.
The stratosphere is the layer of the Earth's atmosphere located above the troposphere and below the mesosphere. It contains a high concentration of ozone, which forms the ozone layer.
Ultraviolet (UV) rays: UV rays are a type of electromagnetic radiation emitted by the Sun. They have shorter wavelengths than visible light and can cause damage to living organisms, including skin cancer and cataracts.
Ozone depletion: Ozone depletion refers to the thinning or reduction in concentration of ozone molecules in the ozone layer. This can be caused by human-made substances called ozone-depleting substances (ODS), such as chlorofluorocarbons (CFCs), which contribute to global warming and climate change.