A selection of the following will be explored: the atmosphere (composition; density, pressure and temperature; variations with altitude, principal layers; hydrostatic equation; altimetry). Thermal/moisture processes (properties of dry and moist air, phase changes, latent heat; long- and short-wave radiation; heat flows, energy balance; development of temperature gradients and thermal circulations). Stability (parcel model of stability, dry and moist adiabatic processes, the aerological (F160) diagram; temperature inversions). Clouds (cloud classification, formation and location). Precipitation (types of precipitation and relation to cloud type; droplet formation and growth). Wind (meteorologically significant forces, equations of motion, geostrophic and gradient flows; variations with height and time). Meteorological practice (terminology, instruments, observations, forecasts).