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Change is Ecosystems
NA
10
Science
5th Grade
10/07/2013

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Term
invasive species
Definition
an organism that is introduced to an area in which it would not have naturally lived
Term
non-native species
Definition
a species introduced to an area in which it would not naturally be found
Term
overpopulation
Definition
a situation that occurs when a population becomes too great in number for the area they occupy, so that resources become scarce
Term
grazers
Definition
herbivores that usually feed on grass
Term
extinction
Definition
the death of all members of a species
Term
deforestation
Definition
to cut down trees in a forest
Term
conservation
Definition
using natural resources wisely in order to protect them
Term
pollution
Definition
Waste that harms air, land, or water
Term
poaching
Definition
to hunt or fish illegally
Term
overfishing
Definition
to excessively exhaust the supply of fish
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