Rivers and Waterways
The point where two or more rivers meet and flow together.
confluence
The continuous movement of water on, above, and below the surface of the Earth.
hydrological cycle
A large rock, typically one that has been worn smooth by erosion.
boulder
Water held underground in the soil or in pores and crevices in rock.
groundwater
A loop-like bend or winding curve in the course of a river.
delta
The conversion of a vapor or gas to a liquid, such as water vapor turning into clouds.
condensation
A steep, high face of rock, especially at the edge of the sea.
cliff
A property of a material or rock layer that does not allow fluid to pass through it.
impermeable
A winding curve or bend in a river, caused by lateral erosion.
meander
Pellets of frozen rain which fall in showers from cumulonimbus clouds.
hail
Soft, finely stratified sedimentary rock that formed from consolidated mud or clay and can be split easily into fragile slabs.
shale
Soil or land capable of producing abundant vegetation or crops.
fertile
The tidal mouth of a large river, where the tide meets the stream.
estuary
Rain, snow, sleet, or hail that falls to the ground.
precipitation
A narrow valley between hills or mountains, typically with steep rocky walls and a stream running through it.
gorge
To make something impure or dangerous by exposure to or addition of a poisonous or polluting substance.
contaminate
An area or ridge of land that separates waters flowing to different rivers, basins, or seas.
watershed
The process of water movement through a plant and its evaporation from aerial parts, such as leaves.
transpiration
The sliding down of a mass of earth or rock from a mountain or cliff.
landslide
A rough fiber used for making sacks, rope, and coarse fabrics, obtained from a tropical plant.
jute