The movement of water into soil — also known as infiltration.
Percolation
The change in state from a gas to a liquid
Condensation
An instrument used to measure precipitation
Rain gauge
A person who forecasts the weather and studies the climate
Meteorologist
The part of earth that supports life
Biosphere
Evaporation of water from the leaves of a plant
Transpiration
Trophic level at the bottom of an energy pyramid
1st level
Forms when water vapor condensed around dust
The entire body of saltwater that covers 71% of the earth
Ocean
An organism that lives on/inside the body of another
Parasite
The largest population that an area can support
Carrying capacity
Triangular diagram that shows the flow of energy through a food chain
Energy pyramid
Spring water
A behavior or physical characteristic that allows an organism to live successfully in its environment
Adaptation
An organism that provides a home for another organism
Host
A close relationship between two organisms in which at least one organism benefits
Symbiosis
When water runs over the surface of a larger body of water.
Runoff
The change of a substance from a liquid to a gas
Evaporation
The community of organisms that live in a particular area, along with their nonliving surroundings
Ecosystem
A process by which characteristics that make an individual better suited to its environment become more common in a species.
Natural selection
A consumer that eats secondary consumers
Tertiary consumer
water that's contained in an aquifer under the ground
ground water
The continuous movement of water between the atmosphere, land, and oceans
Water cycle
The number of individuals in a certain are
Population density
When an organism hunts, kills, and then eats another organism
Predation