by:mason whitworth

A steep sided low lands that rivers have cut through.

Area with trees, marshes, and lots of rain.

The area where the ocean touches the land.

A naturally raised area of land, not as high as a mountain.

A tower of rock formed by the collision of earths tectonic plates, volcano

Flat area of land with little or no hills. 

A flat area of land that is higher than the area around it.

A body of rock that can contain or transmit groundwater.

A large natural or artificial lake used as a source of water supply.

A river or stream flowing into a larger river or lake.

Easily replaced by earth's natural process.

Can't be replaced by Earth's natural process.

Many were brought as slaves during early and mid 1800s. 

A measure of economic growth from one period to another.

The numbers of persons in successive age categories in a given population

The movement of people from one country to another.

First people to live in Texas.

Came from southern borders across to Texas.

the study of statistics such as births, deaths, income, or the incidence of disease, which illustrate the changing structure of human populations.