Abiotic factor The non-living parts of an ecosystem – dirt and water

Biotic factor The living parts of an ecosystem – plants and animals

Divide An area that separates one watershed from another

Ecosystem A working unit made up of living and non-living things

Estuary An area where freshwater mixes with salt water

Pollution Anything that has a negative effect on the environment

Tributary A river or stream that feeds into a larger river or stream.

Watershed An area of land that drains into a specific body of water

Wetland An area where water covers the soil for all or part of the year

Water quality Measures how clean the water is

Fill in the “Estimated Percent” column Fill in the “Estimated Percent” column. All percents should add up to 100%. Location Estimated Percent Actual Percent Oceans   Glaciers and icecaps Surface water Ground water Atmosphere

0.38% 0.61% 0.01% Water Source Actual Percent Surface water – lakes, rivers, ponds, streams, creeks 0.38% Ground water – well-water, water below Earth’s surface 0.61% Atmosphere – clouds and water vapor 0.01%

Water Source Actual Percent Oceans – salt water 97% Frozen water 2%