RES Teen 3 Pre-Test Review

When _____ happens, the water temperature in streams, rivers, lakes and oceans changes.

_____ occurs when the atmosphere contains gasses, dust or fumes in harmful amounts.

When radiation gets into the land, air or water, it is called _____.

Too much use of electric lights in cities may cause _____.

_____ is the contamination of lakes, rivers, oceans or underground water, usually by human activities.

_____ happens when human activities destroy the Earth's surface.

The sight of too many telephone poles, advertising billboards, overhead power lines or shop signs may cause _____.

The number of people in a place in relation to its area.

• overcrowded

• slum

• density

• spacious

A market usually held outdoors.

• flea market

• slum

• overpopulation

• megacity

A very large city, typically one with a population of over 10 million.

• population explosion

• overcrowded

• overpopulation

• megacity