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Lowesrmabry Lowesrmabry Presentation Transcript

  • ECOSYSTEMS
  • 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 sun’s 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.
  • 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
    View slide
  • 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?
    View slide
  • 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?
  • 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.
  • 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.
  • ACTIVITY
    • Organize charts that compare how your needs are met in your community to how plants’ and animals’ needs are met in their community.
  • 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.
  • NONLIVING PARTS OF AN ECOSYSTEM
    • SUNLIGHT
    • AIR
    • TEMPERATURE
    • SOIL
    • WATER
  • 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 organism’s role or job in the environment.
    • Name an organism from the forest environment and describe its niche in that environment.
  • LIVING THINGS
  • SUMMARY
    • An environment that meets the needs of an organism is called a habitat.
    • An organism’s niche is its role within that habitat.
    • As organisms carry out their roles, they can affect both living and nonliving parts of that ecosystem.