Download Organisms - St. Michael Catholic School

LIVING THINGS AND
THE ENVIRONMENT
1.1
• An organism gets:
• Food
WHAT DOES AN
ORGANISM GET FROM
ITS ENVIRONMENT?
• Water
• Shelter
• Other things it needs to live, grow and
reproduce from it’s environment
• Habitat: an environment that provides the things a
specific organism needs to live, grow, and reproduce
• Different organisms live in different habitats –
different requirements to live and reproduce
WHAT ARE TWO PARTS OF AN ORGANISM’S
HABITAT?
• An organism interacts with both the
living and nonliving parts of its
habitat.
• Biotic Factors: the parts of a habitat that
are living, once living, and interact with an
organism
• Examples: plants, animals, worms, bacteria,
owl pellets, decomposing plant matter
• Complete figure 1
WHAT ARE THE TWO PARTS OF AN ORGANISM’S
HABITAT?
• Abiotic Factors: the nonliving parts of
an organisms habitat.
• Examples: sunlight, soil, temperature,
oxygen and water
• Complete figure 2.
• Complete apply it!
HOW IS AN
ECOSYSTEM
ORGANIZED?
• Most organisms don’t live all alone in their habitat.
• Organisms live together in populations and
communities that interact with abiotic factors in their
ecosystems.
• Organisms, populations, communities, ecosystems
HOW IS AN ECOSYSTEM ORGANIZED?
• Organisms:
• Species: a group of organisms that can
mate with each other and produce
offspring that can also mate and reproduce
• Example: prairie dog
• Populations: all the members or one
species in a particular area
• Example: all the prairie dogs in the
Nebraska town
HOW IS AN ECOSYSTEM ORGANIZED?
• Communities: all the different
populations that live together in an area
• Example: a prairie includes prairie dogs,
hawks, snakes and grasses
• Ecosystems: the community of
organisms that live in a particular area,
along with the non living environment
HOW IS AN ECOSYSTEM ORGANIZED?
• The smallest level of organization is a
single organism, which belongs to a
population that includes other members
of its species.The population belongs to a
community of different species.The
community and abiotic factors together
form an ecosystem.
• Any change affects all the different populations
that live there.
• Ecology: the study of how organisms interact
with each other and with their environment