Chpt 1- Earth: The Water Planet

27 terms by smithisabel 

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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

solution

A mixture that forms when one substance dissolves another

solvent

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

evaporation

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

condensation

the process by which a gas changes to a liquid

photosynthesis

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

habitat

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

groundwater

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

transpiration

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

precipitation

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

tributaries

streams and smaller rivers that feed into a main river

water shed

land area that supplies water to a river system

divide

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

reservoir

a lake that stores water for human use

nutrients

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

wetland

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

permeable

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

impeameable

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

aquofer

any underground layer of rock or sediment that holds water

artesian well

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

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