.
Organism
Any individual living thing.
Population
All the individuals of a species that live
in the same area
Community
Collection of all of the different
populations that live in one area
External Factors
Factors or conditions found outside a
system.
Microorganism
Organisms too small to be seen with
the naked eye, they require the use of
a microscope to be seen.
Ecosystem
Collection of organisms and nonliving
things, such as climate, soil, water, and
rocks in one area
Ecological
succession
Sequence of biotic changes that
regenerate a damaged community or
start a community in a previously
uninhabited area
Diversity
Vast number of different types of
organisms
Symbiosis
Relationships
Ecological relationship between
members of at least two different
species that live in direct contact with
one another.
Predation
Process by which one organism hunts
and kills another organism for food.
Parasitism
Ecological relationship in which one
organism benefits by harming another
organism
Commensalism
Ecological relationship in which one
species receives a benefit but the
other species is not affected one way
or another
Mutualism
Ecological relationship between two
species in which each species gets a
benefit from the interaction
Competition
Ecological relationship in which two
organisms attempt to obtain the same
resource.
Variation
Differences in physical traits of an
individual from the group to which it
belongs
Adaptation
Inherited trait that is selected for over
time because it allows organisms to
better survive in their environment
Matter
Anything that has a mass and takes
space
Energy
Ability to do work; is associated with
motion. Ex:kinetic, potential, thermal,
chemical, electrical and nuclear
Trophic level
Level of nourishment in a food chain
Food Chain
Model that links organisms by their
feeding relationships
Food Web
Model that shows the complex
network of feeding relationships
within an ecosystem
Ecological
Pyramid/Energy
Pyramid
Diagram that compares energy used
by producers, primary consumers and
other trophic levels
Long-term survival
Live for a long time
Resources
A source of supply
Carbon Cycle
Carbon continuously flows from the
environment to living organisms and
back again.
Nitrogen cycle
Nitrogen continuously flows from the
environment to living organisms and
back again.
Environmental
Change
Change in the environment (ex: caused
by variation in temperature, pollution,
water…)