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Vocabulary Review
Ecology
Portion of earth that
supports life.
Biosphere
Nonliving elements in an
ecosystem.
Abiotic Factors
Living elements in an
ecosystem.
Biotic Factors
All the individuals of the
same species in an area.
Population
A collection of
interacting populations.
Community
The community plus
the physical factors in
an area.
Ecosystem
Variety of life in an area,
usually measured as the
number of species can
live in an area.
Biodiversity
The place where
organisms live out their
lives.
Habitat
The role and position
a species has in its
environment.
Niche
Animals that kill and
eat other animals.
Predator
Animals that predators
hunt, kill and eat.
Prey
The act of one organism
feeding on another.
Predation
A word that means
“living together.”
Symbiosis
A symbiotic relationship in
which one species benefits and
the other species is neither
harmed nor benefited.
Commensalism
A symbiotic
relationship in which
both species benefit.
Mutualism
A symbiotic relationship
in which one organism
benefits at the expense of
the other.
Parasitism
Organisms that are able
to make their own food.
Autotrophs
Organisms that are not
able to make their own
food. They must ingest
food.
Heterotrophs
Organisms that obtain
nutrients by eating other
organisms.
Consumers
Animals that feed on
animals that have already
died.
Scavengers
Organisms that feed on dead
or decaying plants or animals
break them down into simpler
molecules and return them to
the soil.
Decomposers
A simple model that
scientists use to show how
matter and energy move
through an ecosystem.
Food Chain
Feeding step in
a food chain.
Trophic Level
Energy decreases as
tropic level increases.
(True or False)
True
Only 10 percent of energy
is transferred from one
tropic level to the next.
(True or False)
True
The initial source of
energy for ecological
pyramids is energy
from where?
The Sun
Cycle where water is
reused over and
over again.
The Water Cycle
The air is what
percent nitrogen.
78%
6CO2 + 6H2O + sunlight &
chlorophyll C6H12O6 + 6O2
Photosynthesis
6O2 + C6H12O6 --> 6H2O +
6CO2 + energy
Cellular Respiration
Plant-eaters
Herbivores
Organism that eat
plants and animals
Omnivore
Organism that eat
only animals.
Carnivore
It takes a large number of
producers to support a
small number of primary
consumers. (True or False)
True
Interconnected food
chains that show the
feeding relationships in an
ecosystem
Food Web
A J-shaped curve
shows what type of
population growth?
Exponential Growth
Cutting down trees to
build houses.
Deforestation
This gas causes
global warming.
Increased CO2
Another name for
autotrophic Nutrition.
Photosynthesis
The number of organisms of
one species that an
environment can support.
Carrying Capacity
Any biotic or abiotic factor that
restricts the existence, numbers,
reproduction, of distribution of
organisms.
Limiting Factor
The study of human
population growth
characteristics.
Demography
Movement of individuals
into a population.
Immigration
Movement of individuals
out of a population.
Emigration
An increase in the size of
a population over time.
Population Growth
An S-Shaped curve
shows what kind of
population growth
Logistic Growth