Solids in the atmosphere include dust particles, ice crystals, and snowflakes. Dust particles are small particles of solid matter, such as pollen, smoke, and volcanic ash. Ice crystals are formed when water vapor in the atmosphere freezes. Snowflakes are formed when ice crystals clump together.
Liquids in the atmosphere include water droplets and aerosols. Water droplets are formed when water vapor in the atmosphere condenses. Aerosols are small particles of liquid matter, such as fog, mist, and clouds.
Gases in the atmosphere include nitrogen, oxygen, argon, and carbon dioxide. Nitrogen makes up about 78% of the atmosphere, while oxygen makes up about 21%. Argon makes up about 0.9% of the atmosphere, and carbon dioxide makes up about 0.04%.
