abiotic - non-living (dirt,soil,air,water), biotic - anything living or once was living ( animals, cows, people, ecosystem - a combanation of all living and non-living things in an area, erosion - the wearing away of rock or soil by wind, water, and or ice, divide - a dividing ridge (like a mountain range) that separates one drainage area from the others, tributary - small streams or rivers that flow into a larger river, river system - a river and all of its tributarys, wetland - areas were dry land and bodies of water such as rivers, lakes, or bays meet, estuary - where fresh and salt water mix, topography - the study of shapes and features on the earths surface , habitat - a place where organisms make it's home, flood plain - wide, flat areas of water bodies that spill out onto land when the waters are high, ph values - a measure of acidic or basic nature of a substance , salinity - the amount of salt in water, turbidity - cloudiness or murkiness of water due to suspended partials of dirt, pebbles, ect., brackish - a mixture of salty and fresh water, dissolved oxygen - the amount of dissolved oxygen in water to support aquatic life , source pollution  - the specific source or cause of pollution , pollutant - a waste material that contaminates water, aquatic - refers to water, watershed - the land through which all water flows as it enters a body of water, bay - a coastal body of water connected to a larger body or water such a a sea or lake , groundwater - water in the ground, conservation - the act of keeping and protecting from waste loss or destruction, industrial waste - material consider to be no longer of use after a manufacturing process has been completed , agricultural waste - unwanted or unused materials produced from agricultural operations,

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