an underground chamber that opens to the surface from at least one point
Cave
a large stream of flowing water
River
land that is surrounded by water on all sides
Island
land that rises above its surroundings has a rounded summit
Hill
large chunks of ice that break off from glaciers and fall into the ocean floating until they melt
Iceburg
flat or gently rolling lands, usually not far above sea level
Plains
a deep narrow valley with steep sides and high walls that was carved out by a river
Canyon
a body of water completely surrounded by land; usually freshwater
Lake
low-lying land between hills or mountains carved out by rivers or glaciers; sides are gradually sloping
Valley
a large body of water partially surrounded by land that is actually an inlet of an ocean
Gulf
a narrow piece of land that sticks out and is surrounded by water on three sides
Peninsula
a jet of hot water and steam that erupts from a deep hole in the earth’s crust where volcanism is or has occurred or where a hot spot is present
Geyser
narrow strip of water that connects two larger bodies of water
Strait
flat broad uplifted landmass that is higher than the surrounding land; has at least one steep side, called a cliff
Plateau
a narrow strip of land that connects two larger landmasses
Isthmus