The Flint water crisis was a drinking water contamination problem in Flint, Michigan that started in April 2014 when the drinking water source was changed to the Flint River and due to insufficient water treatment, residents were exposed to high levels of lead in the drinking water.
The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation. The water falling on land collects in rivers and lakes, soil, and porous layers of rock, and much of it flows back into the oceans, where it will once more evaporate. The cycling of water in and out of the atmosphere is a significant aspect of the weather patterns on Earth. The water travels through the atmosphere and traveling through the geosphere, hydrosphere, biosphere and back to the atmosphere by evaporation (changes liquid into water vapor gas which then floats up into the skies to become clouds), condensation (water vapor gas condenses back into liquid water and ice), precipitation (moves water vapor and clouds all around), and groundwater flow.
A watershed is a area of land draining to a river or stream. It includes rivers, streams, lakes . Everyone lives in a watershed and everyone contributes to the health of the watershed. The four parts of a watershed include river, lakes, streams, or ground water. The 4 human factors that affect a watershed include: parks, school yard, mall parking lots, and homes.