| A | B |
|---|
| basin | area of land drained by a given river, area of land surrounded by lands of higher elevation |
| bay | part of a large body of water that extends into a shoreline, generally smaller than a gulf |
| continent | one of the seven large landmasses on the earth |
| glacier | a large, thick body of slowly moving ice |
| gulf | large body of water that extends into a shoreline, generally larger and more deeply indented than a bay |
| island | a land area completelyl surrounded by water, but is smaller than a continent |
| isthmus | narrow stretch of land connecting two larger land areas |
| mesa | broad, flat-topped landform with steep sides; smaller than a plateau |
| mountain | land with steep sides that rises sharply (usually 1,000 feet or more) from the surrounding land, generally larger and more rugged than a hill |
| peninsula | body of land jutting into a lake or ocean, surrounded by water on three sides |
| physical feature | characteristic of a place occurring naturally, such as a landform, body of water, climate pattern or resource |
| plain | an area of level land, usually at low elevation and often covered with grasses |
| river | a large natural stream of water that runs through land |
| sea | a large body of water completely or partly surrounded by land, not an ocean |
| source | the place where a river or stream begins, often in the highlands |
| strait | narrow stretch of water joining two larger bodies of water |
| tributary | small river or stream that flows into a large river or stream, a branch of the river |
| volcano | mountain created as liquid rock and ash erupt from inside the earth |
| cape | point of land that extends into a river, lake or ocean |
| canyon | steep-sided lowlands that rivers have cut through a plateau |
| channel | like a strait but wider; a body of water between two pieces of land and they connect two larger bodies of water |
| cliff | steep, high wall of rock, earth or ice |
| trench | valleys on the ocean floor, lowest spots in the earth's crust |
| highland | elevated land areas such as hills, mountains, plateaus |
| divide | stretch of high land that separates river systems |
| delta | deposits of soil, that build up over time at the mouth of the river |
| continental shelf | a plateau that stretches for several miles under water |
| lake | a sizable inland body of water |
| lowland | land, usually level, at low elevation |
| mouth | where the river empties into another body of water |
| ocean | one of the four major bodies of salt water that surround the continents |
| ocean currents | stream of either cold or warm water that moves in a definite direction through an ocean |
| hill | elevated land with sloping sides and a rounded summit (top), usually smaller than a mountain |
| plateau | an area of flat or rolling land at high elevation, about 200 to 3,000 feet high, flat-topped |
| seacoast | land lying next to a sea or an ocean |
| sound | broad inland body of water, often between a coastline and one or more islands off the coast |
| upstream | direction opposite the flow of a river; toward the source of the river or stream |
| Asia | largest continent |
| Australia | smallest continent |
| Russia | largest country |
| Vatican City | smallest country |
| Nile River | longest river |
| Lake Baikal | deepest freshwater lake |
| Angel Falls | highest waterfall |
| Mount Everest | highest mountain |
| Sahara Desert | largest desert |
