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19 terms

Chp. 19 Cycles in Nature

Holt - Science & Technology Chp. 19- Cycles in Nature The Cycles of Nature Ecological Succession
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succession
The replacement of one type of community by another at a single place over a period of time.
pioneer species
A species that colonized an uninhabited area and that starts a process of succession
evaporation
The change of a substance from a liquid to a gas
condensation
The change of state from gas to a liquid
precipitation
Any form of water that falls o the earths surface from the clouds
decomposition
The breakdown of substances into simpler molecular substances
combustion
The burning of a substance
biodiversity
The variety of species in an area
Runoff
is precipitation that falls on land and then goes into rivers and lakes
Animals get the carbon they need
by eating plants.
decomposition
Organic matter being broken down by bacteria and returning
carbon dioxide and water to the environment
What organisms need to build proteins and DNA
nitrogen
How do most animals get the nitrogen they need?
from eating other organisms
Primary succession
is a community growing in an area where organisms have never lived
Primary succession begins
on bare rock.
Climax species
is a well adapted species in a mature community.
A forest fire can show succession because
the trees and plants have been destroyed
however there is still soil that contains nutrients that
was unaffected therefore organisms will begin to
re-grow.
Biodiversity lets
a community undergo changes and survive
mature community
has organisms that are well adapted to live together in the same area over time