| A | B |
| abundance | unlimited amount,more than enough |
| delta | land made of a silt left behind as river drains into a larger body of water |
| desert | a dry environment with few plants and animals |
| gulf | part of an ocean that extends into land;larger than a bay |
| harbor | a sheltered place along a coast where boats dock safely |
| island | a body of land completely surrounded by water |
| isolation | separating from, setting apart |
| isthmus | a narrow strip of land that connects two larger bodies of land |
| lake | a body of water completely surrounded by land |
| landlocked | completely surrounded by land |
| monopoly | complete control over a good or service |
| mountain | a high land form with steep sides; higher than a hill |
| mouth | the place where a river empties into a larger body of water |
| natural resources | natural things in our environment that help support life |
| ocean | a large body of salt water; oceans cover most of the earth's surface |
| peninsula | a large body of land nearly surrounded by water |
| plain | a large area of nearly flat land |
| plateau | an area of elevated flat land |
| rainforest | a warm, wet forest that receives more than 80 inches of rain per year |
| river | a stream of water that flows across the land and empties into a larger body of water |
| rugged coastline | a strong outline of a body of water |
| scarcity | limited amount, not enough |
| sea | a great body of salt water |
| source | the starting point of a river |
| strait | a narrow waterway that connects two larger bodies of water |
| valley | an area of low land between hills or mountains |