Food Chains, Webs

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Food Chains, Webs Pyramids
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_______factors in an ecosystem are factors that
are living.________factors in an ecosystem are
factors that are not living (i.e. water, soil,
air etc.)If you do not know the above terms,
write them on the back of your student sheet.
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_________(also called autotrophs) make their own
food.__________(also called heterotrophs) obtain
their food from consuming different organisms
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(No Transcript)
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________ are organisms that feed by breaking
down and absorb nutrients from dead organisms.
(examples Bacteria, fungi)
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A _________is a simple model that show how
matter and energy move through an ecosystem.
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A ________is a model that shows all of the
possible feeding relationships at each trophic
level in a community.
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Whether you are analyzing a food chain or a food
web..
The Arrow ( )represents the amount of
energy transferred!
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On the food webs to the right...1. Circle the
producers. 2. A primary consumer eats
producers3. Put a 1 on the primary
consumers.4. A secondary consumer eats
primary producers.5. Put a 2 on the secondary
consumers.6. A tertiary consumer eats
secondary consumers.7. Put a 3 on the tertiary
consumers.
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8. Complete the following table based on the
information in the 1st food web.
Organism Obtains its energy from
Raccoon
Wolves
Mice
Snakes
Deer
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10. In the 2nd food web, would there be more
Hawks or Snakes? _____________ Mouse or berry
bushes? _____________Explain your answer to 10
according to the flow of energy
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11. What would the X represent in the food web
diagram below? 
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12. Number the trophic levels of the pyramid
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10 Rule10 of available energy in an
ecological pyramid is transferred to the next
trophic level.The remaining energy is given off
as heat (thermal energy)
Heat
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13. According the pyramid, trophic level 2 has
376 kilocalories of energy. Write in the amounts
of energy the remaining trophic levels would
have. (Hint use 10 rule)
376 kcal
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14. What happens to the remaining energy that is
not used at each trophic level?
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Practice TAKS Question
In this food pyramid, which level contains the
greatest amount of energy? A Tertiary
consumers B Secondary consumers C Primary
consumers D Producers
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Practice TAKS Question
In this diagram of a marine food web, which term
describes the sea turtles (Grade 11 2006F
B.12E,)? A Aquatic herbivores B Autotrophic
producers C Third-level consumers D Primary
decomposers
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Practice TAKS Question
In this food chain, the spiders are (Grade 10
2003 B.12-E) A producers B primary consumers C
competitors D secondary consumers
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Practice TAKS Question
The table lists four groups of factors found in
a particular ecosystem. Which group consists of
only abiotic factors? (Grade 11 2004J B.12-E) F
Group 1 G Group 2 H Group 3 J Group 4