(a) Precipitation — It is process by which condensation in different forms falling on the ground e.g. rainfall, snowfall, drizzle, sleet and hail etc.
(b) Evaporation — It is the process of converting water into water droplets and vapour.
(c) Condensation — It is the process of converting the water- droplets into water.
(d) Humidity — It is the amount of moisture present in the atmospheric air.
(e) Latent heat — It is the unseen heat absorbed by the atmospheric air to form vapour after reaching boiling point of 100°C of water.
