A region that has similar landform features
This natural process has worn down the Appalachian Mountains
It is where a place is compared to other places
The surroundings in which people, plants, and animals live
This is how people change the land to improve movement of goods and people
It is an area in which many features are similar
Earth's seven largest landmasses
This is how the climate of the Southwest differs from the climate of the Northeast
A group of connected mountains
The number of contiguous states
This is the relationship between Earth and the sun that causes the seasons
The gradual wearing away of the Earth's surface
An area of flat or rolling land covered mostly by grasses
The kind of weather a place has over a long time
This is the reason why people modified rivers and streams
This describes states next to each other
This is the number of people in an area
by digging channels
erosion
mountain range
region
landform region
contiguous
climate
population
forty-eight
It is hotter and drier
the change in the Earth's tilt toward the sun
environment
relative location
continents
prairie
water was used for drinking and generating electricity
erosion
