Explore atmospheric moisture in this comprehensive Earth Science lecture. Delve into water's changes of state, including solid phase and latent heat. Examine the phase change diagram of water, understanding processes like evaporation, condensation, sublimation, and deposition. Investigate humidity concepts such as saturation, mixing ratio, and relative humidity, and their relationship with temperature. Learn about dew point temperature and methods for measuring humidity. Analyze scenarios involving phase changes, saturation levels, and relative humidity calculations. Gain insights into the temperature at which air parcels reach saturation, enhancing your understanding of atmospheric processes and water cycle dynamics.