waterfall
a stream of water that falls from a high place
volcano
a hole in the earth's crust through which lava, gases and ash are released
valley
an area of low land between mountains or hills
tundra
a cold, dry treeless region where mosses, grasses and lichens grow
swamp
a low, wet area where trees and high shrubs grow
strait
a narrow body of water that connects two larger bodies of water
sound
a long wide ocean inlet
sea
a body of salt water that is partly enclosed by land
river
a long body of water that flows over land
prairie
a region of flat or hilly land covered by tall grasses
plateau
a flat area of land that is higher than the land around it
plain
a large, low area of flat or rolling land with few trees
peninsula
an area of land that is nearly surrounded by water
ocean
the body of salt water that covers most of the earth
mountain
A high area of land with steep sides and a sharp peak
