|A way of representing
something in the world to learn more about.
|To imitate how something happens in the the real world by acting it out using a model.
|The height of a geographical location above a reference point, usually sea level.
|A statement about what a trend means.
|The land area from which water drains into a particular stream, river or lake.
|A measure of steepness. It is the ratio of change in elevation to the change in horizontal distance.
|raised relief map
|A three-dimensional map that shows elevations.
|One watershed that is part of a larger one.
|A process in which Earth’s material are loosened and removed.
|The settling down of Earth’s materials in another area.
|How people use Earth’s surface.
|An area that has a large population and a lot of residential and commercial development.
|The growth and development of urban areas.
|The making of or producing of anything.
|The cutting down and removal of all or most of the trees in a forested area.
|Substances that are added to air, water, or soil that cause harm to the environment.
|Pollution that originates from a single point or location.
|Pollution that comes from many sources over a large area.