Delta – flat, low-lying land built up from soil carried downstream by a river and deposited at its mouth
Desert - any area in which few forms of life can exist because of lack of water, permanent frost, or absence of soil.
Gulf – part of a large body of water that extends into a shoreline; larger than a bay
Hill – elevated land with sloping sides and rounded summit, generally smaller than a mountain
Island- land area, smaller than a continent, completely surrounded by water
Landforms – individual feature of the land, such as a mountain or a valley
Mesa - A broad, flat-topped elevation with one or more clifflike sides
Mountain – land with steep sides that rises sharply from surrounding land
Mouth of the river – a place where a stream or river flows into a larger body of water
Oasis - a small fertile or green area in a desert region, usually having a spring or well.
Peninsula – a body of land jutting into a lake or ocean, surrounded on three sides by water
Plain – an area of level land, usually at a low elevation and often covered with grasses
Source of the river – the starting point of a river, often in the highlands
Volcano - a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals