The document summarizes key aspects of Earth's atmosphere. It describes the early atmosphere and how it has changed over time with the introduction of oxygen and the ozone layer. It then discusses the composition of the modern atmosphere and layers, including the troposphere where humans live and the protective ozone layer in the stratosphere. It also addresses how atmospheric gases transfer heat energy via radiation, conduction and convection, and how wind patterns are formed.

5. Atmospheric gases include nitrogen (78%), oxygen(21%), carbon dioxide, water vapor, and argon.

7. Solids include dust, salt, and pollen.

8. Liquids include water droplets and droplets from volcanoes.

9. Five main layers of the atmosphere!!!

16. Within the mesosphere and thermosphere is a layer of charged particles called the ionosphere that can help carry radio waves.

35. EVAPORATION: SOLAR ENERGY CAUSES LIQUID TO BECOME A VAPOR.

36. Water vapor in the atmosphere can cool and return to liquid form through condensation. (CLOUDS AND PRECIPITATION)

40. Section 3 – Air Movement

41. Wind is the movement of air molecules from an area of high pressure to an area of lower pressure

42. Different areas of Earth receive different amounts of the Sun’s radiation.