a very dry, sandy area with few or no plants growing in it

body of salt water covering about 3/4 of earth's surface

a high, level area of land

an opening in the earth's crust that spews molten rock

Small land surrounded by water on all sides

a large natural flowing stream of water 

a natural hole or hollow in the earth

a raised area of land smaller than a mountain

a long area of low land between mountains or hills

a stream of water that falls from a higher place

a large, flat area of land with little or no trees

a small body of still water

a large body of  water that is surrounded by land

a deep valley with steep sides

a channel of water made by humans