Living Things Interact
Developed by
Trent Voyles
Ecosystems
• All the living and nonliving things that
interact with each other in an environment.
• Ecosystems include individuals,
populations, and communities.
• In a healthy ecosystem, populations are
interdependent.
Individuals and Populations
• A single organism in
an environment is
called an individual.
• Individuals of the
same kind living in the
same environment
make up a population.
Community
• All the populations of organisms living together
in an environment make up a community.
Habitat and Niche
• Habitat comes from
the Latin verb
meaning “to dwell.”
• An organism’s habitat
is where it dwells or
lives.
• A niche is a certain
role that each
population has in its
habitat.
• Eagles and owls
share the same
habitat and food.
Eagles hunt during
the day and owls at
night, different niches.
Limiting Factors
• Limiting factors
include the following:
•
•
•
•
•
Soil conditions
Temperature
Rainfall
Number of Plants
Amount of Food
Population Density
• Population density is the number of
animals in a certain area.
• Limited resources, such as food, will affect
the size of population that can live in a
certain area.
Nonliving things that affect the
organisms living in an ecosystem
include weather, landforms, and –
A. Habitat
B. Niche
C. Soil
D. Population
Nonliving things that affect the
organisms living in an ecosystem
includes weather, landforms, and -
C. Soil
An ecosystem is made up of a
community and its A. Population
B. Environment
C. Niche
D. Landform
An ecosystem is made up of a
community and its -
B. Environment
The types and number of animals
in an ecosystem are determined by
the A. Types and number of plants
B. Types and number of communities
C. Types and numbers of individuals
D. Population density
The types and number of animals
in an ecosystem are determined by
the A. Types and numbers of plants
In a healthy ecosystem populations of
living things are A. Independent
B. Enemies
C. Interdependent
D. Large
In a healthy ecosystem populations
of living things are -
C. Interdependent