nonliving physical features of the enviorment
the air that surrounds the earth
the features of a enviorment that are alive or once alive
a mixture of minreal and rock particles
the area's average weather conditions
when liquid water changes into water vapor and enters the atmosphere
the process of changing gas to a liquid
a model that describes how water moves from the surface of earth to the atmosphere
types of soil bacteria can form nitrogen compunds plants need
the transfer of nitrogen from the atmosphere, to the soil, to living organisms, and back to the atmosphere
describes how carbon molecules move between the living and nonliving world
the production of energy-rich nutrient molecules fomr chemicals
model that shows all the possible feeding relationships among organisms
the amount of energy available at each feeding level in a ecosystem
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