GLOSSARY OF SOCIAL SCIENCE

Inlet: a thin channel of water that leads inland from the sea 
Headland: a small area of land that projects out into the sea 
Peninsula : a large scale oheadland surrounded by water on three sides
Island: a piece of land completately surrounded by water 
Gulf: an area of sea surrounded by land on three sides 
Oceanic ridge: an underwater mountain range that generally covers a large area and reach high altitudes 
Oceanic trech: a long depression on the ocean floor that can be thousand of metres deep
Abyssal plain: a flat area of the ocean floor 
Continental shelf: the undersea extension of continent that descends gradually to depths of around 400m 
Continental slope: a steep underwater area that links the continental shelf with the ocean floor 
Mountain: a large landform that is higher than the surrounding land 
Basin: an area of land that is drained by a river or a lake and that is lower than the surrounding area 
Valley: a valley is a linear depression in the land 
Plateau: a flat area of land which sits a certain altitude above sea level 
Plain: a large,open,flat or slightly undulating area of land