American Meteorological Society Certification (AMS) Practice

Ozone is a molecule that consists of three oxygen atoms bonded together, which distinguishes it from the more common diatomic form of oxygen, known as O2. The molecular formula for ozone is O3, illustrating that it is an allotrope of oxygen. This three-atom structure gives ozone unique properties, particularly its ability to absorb ultraviolet (UV) radiation in the Earth's stratosphere, thereby protecting living organisms from harmful UV exposure. The molecular structure of ozone results in a bent shape, which contributes to its reactivity and its role in atmospheric chemistry. Its presence in the stratosphere is significant for maintaining the health of ecosystems, while at lower altitudes it can act as an air pollutant, affecting respiratory health. The other choices reference incorrect molecular structures or concepts related to ozone. For instance, the incorrect answers either misidentify the number of oxygen atoms or incorrectly classify ozone as a form of nitrogen or a compound unrelated to its actual chemical identity. Understanding these aspects highlights the importance of ozone and how its molecular structure directly impacts its behavior and function in the environment.