ECOSYSTEMS

1
Click anywhere to start the presentation
2
ECOSYSTEMS

• Science
• Unit B
• Chapter 1

3
A system is a group of parts that work together
as a unit.

• OPEN SYSTEMS
• Most systems are open systems. They take in
  things from outside the system. For example, a
  terrarium takes in energy from the sun.
• Why do plants need the suns energy?

• CLOSED SYSTEMS
• Very few systems are truly closed. Most systems
  receive inputs and give off outputs.
• A diver in a submarine is in an almost completely
  closed system.

4
Explain if these systems are open or closed.

• An aquarium
• a forest
• a sports team
• your family
• an astronaunt on the Space Shuttle
• an automobile

5
Stability

• Stability comes from the word stable. The suffix
  ity forms nouns from adjectives and means the
  condition or quality of.
• Stability in systems means that over time the
  changes in a system cancel each other out. For
  example if something is added, it is later taken
  out.
• The system must remain in balance.
• How does the grass in your yard remain stable?

6
Predict how this tool would help keep your yard
stable.

• What are the inputs in a yard system?
• What are the outputs in a yard system?
• A system that is in balance is said to have what?

7
Ecosystems

• Groups of living things and the environment they
  live in make up an ecosystem.
• Some ecosystems include forests, ponds, and
  streams.
• Explain how some organisms can live in different
  ecosystems.

8
TYPES OF ECOSYSTEMS

• POPULATIONS
• A group of the same species living in the same
  place at the same time is a population.
• Populations live in environments to which they
  are adapted.

• COMMUNITIES
• A community of an ecosystem is made up of all the
  populations that live in the same area.
• The plants and animals that live together depend
  on each other to survive.

9
ACTIVITY

• Organize charts that compare how your needs are
  met in your community to how plants and animals
  needs are met in their community.

10
ANALYZE THIS!

• Sometimes plants and animals are introduced into
  ecosystems that are not native to the ecosystem.
• Can you name a plant or animal that lives in an
  ecosystem that you are familiar with and is not
  native to that ecosystem?
• Predict what might happen if an animal from the
  jungle were introduced into a forest ecosystem.

11
NONLIVING PARTS OF AN ECOSYSTEM

• SUNLIGHT
• AIR
• TEMPERATURE
• SOIL
• WATER

12
LIVING THINGS IN ECOSYSTEMS

• HABITATS
• The environment that meets the needs of an
  organism is called a habitat.
• Read the book A House is a House for Me and
  discuss the different habitats listed.

• NICHES
• A niche is an organisms role or job in the
  environment.
• Name an organism from the forest environment and
  describe its niche in that environment.

13
LIVING THINGS
14
SUMMARY

• An environment that meets the needs of an
  organism is called a habitat.
• An organisms niche is its role within that
  habitat.
• As organisms carry out their roles, they can
  affect both living and nonliving parts of that
  ecosystem.