1. Troposphere: This is the lowest layer, where we live and where weather occurs. It contains about 75% of the atmosphere's mass.
2. Stratosphere: This layer is known for containing the ozone layer, which protects us from harmful UV radiation.
3. Mesosphere: This layer is where most meteors burn up.
4. Thermosphere: This layer is very thin, but contains the ionosphere, which is important for radio communications.
5. Exosphere: This is the outermost layer, where the atmosphere gradually fades into space.
It's important to note that the "abundance" of each layer refers to the mass of air within it, not its thickness. While the troposphere is the thinnest layer, it contains the majority of the atmosphere's mass due to the compression of air by gravity.
