1. Food Chains and the Organisms in them!!!!!
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2. -Matter and energy flow (move) through the environment in cycles.
-Animals and plants depend on these cycles to get the food and nutrients they need to survive.
-There are 2 main categories of organisms in the environment; autotrophs and heterotrophs.
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3. Heterotrophs are consumers; they must eat to get food.
Ex: Lions, Humans, Rabbits.
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4. Autotrophs are producers; they make their own food through a process called photosynthesis.
Ex: Trees, plants, algae.
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5. 10% Rule
When one animal feeds off another, only about 10% of the available energy is transferred.
There is a loss of energy in the form of heat in the process.
Additional loss of energy occurs during respiration and movement of the organisms before they are eaten.
More and more energy is lost as one moves up through trophic levels.

6. Trophic Level A trophic level is each level in a food chain.
3rd Trophic Level
2ND Trophic Level
1st Trophic Level

7. Trophic Levels First trophic level = producers(autotrophs)
Second trophic level = primary consumer(heterotrophs)
Third trophic level = secondary consumer(heterotrophs)
Fourth trophic level = tertiary consumer(heterotrophs)

8. Food Chain
A food chain is the series of organisms showing feeding relationships. A food chain usually begins with a green plant (producer) which is eaten by an animal (consumer). The arrow means 'is eaten by', and shows the flow of energy along the food chain.
Producer -> Consumer 1 -> Consumer 2 -> Consumer 3 ->
Herbivore Carnivore Carnivore
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9. A network of interrelated food chains in a given area
Food Web
A network of interrelated food chains in a given area
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10. CHECKPOINT QUESTIONS!!!!!!
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11. Its eating a primary consumer.
Is this organism a autotrpoh or heterotroph? If it’s a heterotroph what type of consumer is it? Which trophic level is it in?
Heterotroph
Carnivore 3
Its eating a primary consumer.
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12. It is consuming a dead producer
Is this organism a autotrpoh or heterotroph? If it’s a heterotroph what type of consumer is it? Which trophic level is it in? Explain why.
Heterotroph
Decomposer 2
It is consuming a dead producer
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13. It makes it own food and is eaten by consumers.
Is this a autotrpoh or heterotroph? If it’s a heterotroph what type of consumer is it? Which trophic level is it in? Explain why.
Autotroph 1
It makes it own food and is eaten by consumers.
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14. heterotroph- Herbivore 2 It is eating a producer.
Is this organism a autotrpoh or heterotroph? If it’s a heterotroph what type of consumer is it? Which trophic level is it in? Explain why.
heterotroph-
Herbivore 2
It is eating a producer.
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15. Identify the possible food chains and the organisms on each trophic levels.
diatoms, krill,leopard seal, killer whale.
Diatoms producer- 1 st level, krill primary consumer-2nd level, leopard seal secondary consumer- 3rd level, and killer whale tertiary consumer =4th level