Food Chains, Webs and Pyramids
Aquatic Science
Unit 3
I.
________________ ______________ - simple diagram of a ____________ network.
Sample:
________________→________________→_________________→
Producer
Primary Consumer Secondary Consumer
_____________________→____________________
Tertiary Consumer
Quaternary Consumer
A. Producers – organisms that ____________their food by _________________
and are known as _________________
B. Consumers – organisms that get their energy from _______________ and are
known as _________________ because they make their
___________________.
1. Classified By What They Eat:
a. Herbivore - __________________________________
b. Carnivore - __________________________________
c. Omnivore - __________________________________
2. Classified By Their Position (___________ __________) in The
Feeding Network:
a. Primary Consumer – (________ ____________ _______________)
Eat ____________ and are classified as __________________.
b. Secondary Consumer – (______ ____________ ______________)
Eat _____________ and are classified as _________________.
c. Tertiary Consumer – (________ ____________ _______________)
Eat _____________ and are classified as __________________.
C. Decomposers - _________________remains of ____________ organisms.
D. Scavengers –( ________________) ______________ on ______________
organisms.
E. Every food chain begins with a ________________ and ends with a
________________ ________________ (an organism with no natural
________________)
II.
Food Webs
A. Show how _________________ are connected to ___________ ____________
in an __________________________.
B. Definition - _______________________________________________________
________________________________________________________
Aquatic Science
Unit 3
Food Chains, Webs and Pyramids
C. In any food web, _____________ is ____________ each time one organism eats
another.
D. ____________________ in both food webs and food chains show the
___________________ energy is flowing.
III.
Food Pyramids
A. Definition – pyramid diagram that shows the ___________of _____________
when moving up the ______________________ ______________________.
B. At the base of the pyramid is the____________ – the original energy source.
C. Only ____________ of the energy is transferred from one trophic level to the next
meaning. (____________________ is lost each time an organism eats another)
IV.
Comparison of Food Chains, Food Webs, and Food Pyramids
-
a food chain is ________ ___________ of energy, and a food web is _____________
food chains. An energy pyramid shows that there is ___________and __________
_________________ and ______________ available when moving from the
_______________ to the ______________ of the pyramid up the _______________
levels.