| mesa | broad, flat-topped landform with steeps sides; smaller than a plateau |
| mountian | land with step sides that rises sharply(1,000 feet or more) from surrounding land;generally larger and more rugged than a hill |
| mountian peak | pointed to of a mountian |
| mountian range | a series of connected mountians |
| mouth | place where a stream or river flows into a larger body of water |
| ocean | one of the four major bodies of salt water that surround the continents |
| ocean current | stream of ethier cold or warm water that moves in definite direction through ocean |
| parallel | one of many lines on the global grid that circles the earth north or south of the Equator; used to measure degrees of latitude |
| penninsula | body of land jutting into a lake or ocean, surrounded on three sides by water |
| physical feature | characteristic of a place occuring naturally, such as a landform, body of water, climate pattern, or resource |
| plain | area of land, usually at low elevation and often covered with grasses |
| plateau | area of flat or rolling land at a high elevation, about 300-3,000 feet high |
| Prime Meridian | line of the global grid running from the North Pole to the South Pole through Greenwich, England; starting point for measuring degrees of east of west longitude |
| relief | changes in elevation over a given area of land |
| river | large natural stream of water that runs through the land |
| sea | large body of water completely or partly surrounded by land |
| seacoast | land lying next to a sea or an ocean |
| sound | broad inland body of water, often betweenacostline and one or more islands off the coast |
| source | (of a river) place where a river or stream begins, often in high lands |
| strait | narrow stretch of water joining two larger bodies of water |
| tributary | small river or stream that flows into large river or stream; a branch of the river |
| upstream | dicterction opposite the flow of a river; toward the source of a river or stream |
| valley | area of low lands between hills mountains |
| volcano | mountain created as liquid rock and ash erupt from inside the earth |