Aerosphere refers to the layer of the Earth's atmosphere where all the gases and particles can be found. This term is sometimes used interchangeably with other words such as atmosphere, air envelope, or air sphere. The word environment can also be used to refer to the same thing, although it is a broader term that encompasses all living and nonliving things interacting with each other. Additionally, the term troposphere is used to describe the region of the atmosphere closest to the Earth's surface, where most weather takes place. The stratosphere, mesosphere, and thermosphere are other layers of the atmosphere that serve different purposes. All of these words have synonyms that can assist in discussing the Earth's aerosphere.