| A | B |
|---|
| atmosphere | outer layer of gases of a large body in space, such as a planet or star; the mixture of gases that surrounds the solid Earth; one of the 4 parts of the Earth system |
| glacier | large mass of ice that exists year-round and moves over land |
| system | group of objects or phenomena that interact |
| fresh water | water that is not salty and has no taste, color or smell |
| salt water | contains dissolved salts and other minerals |
| water cycle | continuous movement of water on Earth, through its atmosphere, and in the living things on Earth |
| evaporation | process by which liquid changes into gas |
| condensation | process by which a gas changes into a liquid |
| precipitation | any type of liquid or solid water that falls to Earth's surface, such as rain, snow, or hail |
| divide | continuous high line of land - or ridge - from which water drains to one side or the other |
| drainage basin | area of land in which water drains into a stream system |
| turnover | yearly rising and sinking of cold and warm water layers in a lake |
| eutrophication | increase in nutrients in a lake or pond; can occur naturally or as a result of pollution, and causes increased growth of algae and plants |
| iceberg | mass of floating ice that broke away from a glacier |
| groundwater | water that collects and is stored underground |
| permeable | allowing passage of water |
| impermeable | resistant to the passage of water |
| water table | highest part in the ground that is saturated or completely filled with water |
| aquifer | underground layer of permeable rock that contains water |
| spring | flow of water from the ground at a place where the surface of the land dips below the water table |
| artesian well | where pressurized water flows upward to the surface |
