Energy _ Organisms

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					Energy &              7


Organisms
           Energy from sunlight is
       changed to chemical energy in
          plants, transfers between
        living organisms. Changing
       the environment may alter the
        amount of energy provided to
              living organisms .
PHOTOSYNTHESIS
    Photosynthesis converts light energy
            into chemical energy.
CELLULAR RESPIRATION

      Respiration converts chemical
       energy into mechanical and heat
       energy.
Photosynthesis versus
     Respiration
 The path of energy begins when light
energy from the sun is taken in by the
   plants and photosynthesized into
sugars stored in the plant as chemical
                energy.
The path of energy continues when the
deer feed on the grasses in the meadow.
The chemical energy in the plant is
taken in by the deer and transferred to
mechanical energy for the deer to move.
The path of energy continues when the
 mountain lion feeds on the deer. The
 stored chemical energy in the deer is
 now passed to the lion. That energy
   will be used in respiration in the
 muscle cells to allow contraction and
               movement.
DECOMPOSERS &
 SCAVENGERS
   Decomposers break down materials
    from living things once they are dead.
    They return nutrients back into the
    soil.




   Scavengers are organisms that will
    feed on dead meat. This helps these
    materials not go to waste.
  ORGANISM
RELATIONSHIPS
  Producers make their own food while
   consumers rely on eating the producers.




    PRODUCER             CONSUMER
  ORGANISM
RELATIONSHIPS
  Predators hunt their food while prey
   are the hunted organisms.




      PREY     PREDATOR
  SYMBIOTIC
RELATIONSHIPS
   MUTUALISM- a close relationship
    between two species where both
    species are benefitted.
   The plover eats the decayed meat and
    the crocodile gets clean teeth.
  SYMBIOTIC
RELATIONSHIPS
   COMMENSALISM – One species is
    benefitted while the other is
    unaffected.
  The flies feed on the horse hair, but the
    horse is not hurt or helped.
  SYMBIOTIC
RELATIONSHIPS
   PARASITISM – One species is helped
    and one is harmed.
  Fleas live and feed in the skin of dogs.
    It is annoying to the dog.
COMPETITION

  Here vultures and hyenas are
   competing for dead meat.
FOOD CHAINS

     Food chains are a way to trace the
      flow of energy.
FOOD WEBS

 Food webs are a more complex way to
  trace the flow of energy.
ECOSYSTEMS

 Ecosystems include the biotic and
  abiotic factors in a habitat.
ABIOTIC FACTORS
   Abiotic factors such as air,
    temperature, water and light have
    great effects on organisms like plants.
POPULATIONS

  A population is the number of a
   particular species living in an area.
 FACTORS AFFECTING
POPULATION NUMBERS
      Food
      Size of other populations in the area
      (producers, predators, competitors)
      Niche
      Adequate resources
      Non-native (exotic species)
      Abiotic factors
      Toxins and pollutants
 CAPACITY
 The ability of an ecosystem to
  maintain its current condition and
  sustain its life forms.
Positive human effects
      on capacity
      People help create habitats and
       shelter to support populations.
Negative human effects
     on capacity
SAVING THE PLANET

     Many organizations are now trying to
      protect this planet’s resources and
      the populations that live here.
FACT VS INFERENCE
     Facts are statements that are proven
     Inference is someone’s opinion based
      on information.
     - “If everyone lived the lifestyle of the average
      American, we would need five planets.

     - “In recent years Peru has experiences its highest
      economic growth ever and seen significant
      reductions in poverty.”

     -”To the extent human pressure exceeds what
      nature can renew, biodiversity will contain
      continued threats.”

     - “Ecological footprints measure the use of
      resources and the resource capacity of nations
      over time”

				
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posted:5/15/2014
language:English
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