Advertisement Upgrade to remove ads

polar molecule

a molecule that has electrically charged areas

capillary action

the combined force of attraction among water molecules and with the molecules of surrounding materials

surface tension

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


A mixture that forms when one substance dissolves another


the substance that does the dissolving

specific heat

the ammount of heat needed to increase the temperature of a certain mass of a substance by 1 degree celcius


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


the process by which a gas changes to a liquid


the process by which plants use water, alomg with carbon dioxide and energy from the sun, to make their own food


the place where it lives and obtains all the things it needs to survive


water that fills the cracks and spaces in underground soil and rock layers


water is given off through the leaves as water vapor in a process


water that falls to earthas rain, snow, hall, or sleet


streams and smaller rivers that feed into a main river

water shed

land area that supplies water to a river system


one water shed is separated from another by a ridge of land


a lake that stores water for human use


are substances such as nitrogen and phophorus that enable plants plants and algae to grow

eutro phication

over many years, the nutrients built up in the lake in a process


A land area that is covered with a shallow layer of water during some or all of the year.


a characteristic of material such as sand and gravel though which water easily passes


water cannot pass through easily

saturated zone

the area of permeable rock or soil that is totally filled or saturated with water

water table

the top of the saturated zone

unsaturated zone

the layer of rocks and soil above the water table


any underground layer of rock or sediment that holds water

artesian well

a well in which water rises because of pressure within the aquifer

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording