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Lessons 5.1 and 5.2

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  • What is a decomposer?
    ecomposers break down biotic wastes and dead organisms, returning the raw materials, such as carbon and nitrogen, to the ecosystem
  • An organism that can make its own food is a
    producer
  • An environment that provides the things a specific organism needs to live, grow, and reproduce is called a
    habitat
  • In an ecosystem, organisms play the energy role of either
    a producer, consumer, or decomposer
  • Only about _________ percent of the energy at one level of a food web is available to the next higher level.
    10
  • What is a consumer?
    obtains energy by feeding on other organisms
  • What is the levels of organization in an ecosystem?
    Organisms- Populations- Communities- Ecosystem
  • What is abiotic factors?
    nonliving parts of an organism’s habitat
  • Producers have the most available energy so they make up the ________________ of the pyramid.
    first level or base
  • What is a community?
    All the different populations that live together in an area make up a community
  • What is a species?
    A species is a group of organisms that can mate with each other and produce offspring that can also mate and reproduce.
  • What is biotic factors?
    parts of a habitat that are or were once alive and that interact with an organism
  • The food, water, shelter, and other things from its environment is called
    resources
  • What can cause a population's size to increase?
    more births than deaths; more immigration than emigration.
  • What are the three kinds of consumers?
    carnivores, herbivores, omnivores
  • Limiting factors include:
    food and water, climate and weather, space and shelter.
  • An environmental factor that causes a population to stop growing or to decrease in size is a
    limiting factor
  • What are examples of decomposers?
    Mushrooms, bacteria, and mold
  • What is an energy pyramid?
    Energy pyramid shows the amount of energy that moves from one feeding level to another in a food web.
  • What is a food web?
    A food web consists of many overlapping food chains in an ecosystem.
  • Which organisms can use photosynthesis to convert energy from the sunlight to food?
    plants and some bacteria
  • What do decomposers recycle?
    carbon and nitrogen
  • What does emigration mean?
    Emigration means leaving a population.
  • Energy enters most ecosystems as
    sunlight
  • All the members of one species living in a particular area are referred to as a
    population
  • The community of organisms that lives in a particular area, along with the nonliving environment, make up an
    ecosystems
  • What is an organism?
    a living thing
  • What is a food chain?
    A food chain is a series of events in which one organism eats another and obtains energy and nutrients
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