TExES Science 7-12 (236) Practice Test

The function of the ozone layer in the stratosphere is primarily to absorb ultraviolet (UV) radiation from the sun. This layer contains a high concentration of ozone (O3) molecules, which play a critical role in protecting living organisms on Earth from harmful UV rays. These rays can cause skin cancer, cataracts, and other health issues, as well as negatively impact ecosystems by affecting plant growth and marine habitats.

The absorption of UV radiation by the ozone layer allows life to thrive by providing a shield against the sun's more intense and harmful rays. Without this protective layer, the increased exposure to UV radiation could lead to significant ecological damage and health risks for humans and other organisms. Thus, the ozone layer's role is invaluable in sustaining life on our planet.