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					Food Chains
      The Source of ALL Energy
• All organisms need energy.
• The main source of energy on Earth is
  sunlight.
               Producers
• Organisms that make their own food are
  called producers.
• Plants are producers. Algae and bacteria
  are producers too.
• Producers use energy from sunlight to make
  their own food.
• When they make their food, energy from
  the sun is stored in their bodies.
Producers
                Consumers
• Organisms that get energy by eating other
  organisms are called consumers.
• Animals are consumers.
• Animals are classified in 3 groups:
Herbivores
Carnivores
Omnivores
Consumers
                 Herbivores
• Organisms that eat only plants and plant
  products.
• They get energy by eating roots, stems, leaves,
  flowers, fruits, and plant sap.
• Elephants, some insects, gorillas, deer, cows,
  rabbits, grasshoppers, and snails.
                Carnivores
• Organisms that eat other animals.
• Carnivores get energy by eating the bodies of
  other organisms.
• Carnivores have adaptations that make them
  good hunters. Strong legs, sharp claws and
  teeth, good eyes and ears.
• Ladybugs, spiders, lions, sharks, hawks,
  hyenas, killer whales, owls, wolves, and
  praying manitises.
                Omnivores
• Organisms that eat both plants and animals.
• Bears, cockroaches, crows, raccoons, coyotes,
  and humans.
                Decomposers
• Decomposers are
  organisms that eat (get
  their energy from) dead
  plants and dead animals.
• Decomposers break down
  dead materials.
• They help ecosystems by
  returning nutrients back
  to the soil for plants to
  use.
               Food Chains
• All food chains start with the sun. The sun
  gives energy to plants (producers).
• Plants give energy to herbivores (consumer).
• Herbivores give energy to carnivores
  (consumer).
• The path of energy from one organism to
  another is called a food chain.
In a food chain, the arrow points to who is getting the energy.
      In this food chain, the grass is getting energy from the sun.
      The grasshopper is getting energy from the grass.
      The snake is getting energy from the grasshopper.
      The hawk is getting energy from the snake.
Questions
What is an adaptation of a
       herbivore?
Flat teeth to grind plants.
What is an adaptation of a
        carnivore?
Sharp teeth and claws to catch and
             kill prey
What is a decomposer?
Decomposers are organisms that
eat (get their energy from) dead
    plants and dead animals
What provides energy in a food
           chain?
The sun
Does a producer or consumer
    make its own food?
Producer
Where does the arrow point in a
        food chain?
To who is getting the energy

				
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posted:10/25/2012
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