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Ecosystems
 

Ecosystems

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    Ecosystems Ecosystems Presentation Transcript

    • ECOSYSTEMS Science Unit B Chapter 1
    • 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
    • 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?
    • 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.