BD:A molecule that has electrically charged areas.

MD: A molecules that has moved charged areas.

BD: The combined force of attraction among water molecules and with the molecules of surrounding materials.

MD: The attraction of water molecules with other molecules.

BD: The tightness across the surface of water that is caused by the polar molecules pulling on one another.

BD: The tightness on the surface of water.

BD: A mixture that forms when one substance dissolves another.

MD: When a substance dissolves into another.

BD: A substance that dissolves another substance.

MD: A substance that dissolves another substance.

BD: The amount of heat needed to increase the temperature of a certain mass of a substance by 1°C.

MD: The heat needed to increase the temperature of something.

BD: The process by which molecules at the surface of a liquid absorb enough energy to change to the gaseous state.

MD: When a liquid is heated to the point that it changes into a gas.

BD: The process by which a gas changes to a liquid.

MD: When gas changes into a liquid.

BD: A stream or smaller river that feeds into a main river.

MD: A stream that feeds into a river.

BD: The land area that supplies water to a river system.

MD:Land that supplies water to a river system.

BD: A ridge of land that separates one watershed from another.

MD: Land that separates two watersheds.

BD: A lake that stores water for human use.

MD: A lake made for human use.

BD: A substance such as nitrogen or phosphorus that enables plants and algae to grow.

MD: A poison that stops plants from growing.

Eutrophication

BD: The process by which nutrients in a lake build up over time and cause an increase in the growth of algae.

MD: When lake build grows more algae.

BD: A characteristic of materials, such as sand and gravel, through which water easily passes.

MD: A characteristics of materials that water passes through easily.

BD: A characteristic of materials, such as clay and granite, through which water does not easily pass.

MD: Characteristic of materials that water doesn't pass through.

BD: The area of permeable rock or soil in which the cracks and pores are totally filled with water.

MD: Area of permeable rock that's pores are filled with water.

BD: The top of the saturated zone, or depth to the groundwater under Earth’s surface.

MD: The top of the saturated zone under Earth's surface.

BD: The layer of rocks and soil above the water table in which the pores contain air as well as water.

MD: A layer of rock which pores contain air and water.

BD: An underground layer of rock or sediment that holds water.

MD: An underground laid of sediment with water.

BD: A well in which water rises because of pressure within the aquifer.

MD: A well in which the water rises because of pressure.