9781422277553

Words to Understand

acidic— containing acid. delta— a fan-shaped region at a river’s mouth. estuary— the mouth of a river: the part that is tidal. evaporation— the process by which a liquid becomes a gas. fen— a peaty marsh that is low in acidity. floodplain— a flat land flanking a river, which floods in the rainy season. geological fault— a fracture in a bed of rocks. mangrove— one of several types of tree that can grow in water. migratory— making seasonal journeys between regions to breed or to escape an unsuitable climate. peat— a spongy, wet soil made from rotted plant material. sedge— a coarse kind of grass.