Lowland
Low lying or flat land.
Eroded
To be gradually worn away by the action of wind.
Glacier
Large thick sheets of moving ice.
Flatland
Large stretch of level land that doesn't vary in height.
Rivervalley
A low lying of land formed by a river.
Elevation
The height of a specific location such as sea level.
Grassland
Land on which grasses or low land green plants are the main vegetation.
Continental Divide
A line of elevated land in the Rocky Mountains from which rivers flow
from ether side.
Death valley
Lowest point in North America located in the basin and range.
Harbors
Part of a body near the coast in which ships can anchor safely.