2. What is food chain?
• It is a model that shows a sequence of feeding
relationships.
• links species by their feeding relationships
• follows the connection between one producer and
a single chain of consumers within an ecosystem
• Shows how each living thing gets food
• use pictures or words and arrows to show the
movement of energy through the trophic levels
of organisms.
• The energy flow from one trophic level to the
other
3. Words to know
• Producer/autotroph
A group of organisms
that can use the energy
in sunlight to convert
water and carbon
dioxide into Glucose
(food)
produce all of the food
that heterotrophs use
Without autotrophs,
there would be no life on
this planet
Ex. Plants and
Algae
• Heterotroph/Consumers
Organisms that
do not make their
own food
because they
consume other
organisms in
order to live
4. Words to know
• Types of Consumers
Herbivore - an organism that
only eats plants
Carnivore - an organism that
only eats meat
Omnivore - an organism that
eats meat and plants
5. Words to know
• Decomposers
Break down dead
plants and animals
Reduces dead
organisms to simpler
forms of matter
Bacteria and fungi
are two examples
7. Transfer of energy
• Only 10% of the energy from one trophic
level is transferred to the next – this is
called the 10% law
• Energy moves from one organisms to
another when it is eaten
• Each step in this transfer of energy is
know as a trophic level
The main trophic levels are producers,
consumers, and decomposers
10. FOOD WEB
• Most organisms eat more than JUST one
organism
• When more organisms are involved it is known
as a FOOD WEB
• Food webs describe the organisms found in
interconnecting food chains using pictures or
words and arrows.
• In other words, food webs are a bunch of food
chains all together.
• They describe the complex patterns of energy
flow in an ecosystem by modeling who
consumes whom or what.
14. Energy pyramid
• An energy pyramid shows the
amount of energy that moves from
one trophic level to another in a
food chain.
• The most energy is available at the
producer level of the pyramid.
• The availability of energy
decreases as it moves up the
energy pyramid.
17. BIOMASS
• The total mass of the organic
matter at each trophic level is
called biomass
• Biomass is just another term for
potential energy – energy that is
to be eaten and used.
• The transfer of energy from one
level to another is very inefficient
(10% Law)
20. quiz
1. A ___________ makes its own energy
and begins the food chain.
a. consumer
b. producer
c. herbivore
d. decomposer
21. quiz
2. A diagram that shows the transfer of
energy in one line is a...
a. food web
b. food chain
c. food line
d. food court
22. quiz
3. A _______________ cannot make its
own energy and eats only plants for their
energy.
a. producer
b. Primary consumer
c. Secondary Consumer
d. Tertiary Consumer
23. quiz
4. A type of consumer that eats primary
consumers is called a...
a. Herbivore
b. Prey
c. Tertiary Consumer
d. Secondary Consumer
24. quiz
5. A type of consumer that eats only
meat is called a...
a. herbivore
b. carnivore
c. omnivore
d. brucivore
25. quiz
6. A type of consumer that eats both
meat and plants is called a...
a. herbivore
b. carnivore
c. omnivore
d. brucivore
27. quiz
8. What is this called?
a. Food Web
b. Food Chain
c. Food park
d. Food trip
28. quiz
9. Which is a Primary Consumer?
a. Lizard
b. Grass
c. Grasshopper
d. Snake
29. quiz
10. Which organisms from the Food Web
are consuming the Insects?
a. Lynx, Hare
b. Shrew, Red fox
c. Lynx, Red Fox
d. Hawk, Shrew
30. quiz
11. What is a producer?
a. an organism that gets energy from eating other
organisms
b. an organisms that uses sunlight to make its own food
c. an organism that gets energy from eating dead
organisms, non-living material or waste
d. an organism that uses chemical energy to make its
own food
31. quiz
12. An organism that gets energy from
eating other organisms is a __________
a. producer
b. consumer
c. decomposer
d. prey
32. quiz
13.Use the diagram to answer the question.
The Mayfly is a food source for which 3 organisms?
a. Frog, Dragon Fly and snake
b. Frog, trout and dragon fly
c. Frog, salamander and trout
d. Frog and phytoplankton
33. quiz
14. Where does the energy start in this
food chain?
a. Plant
b. Sun
c. Deer
d. Wolf
34. quiz
15. Overlapping food chains in an
ecosystem make up....
a. food web
b. food chain
c. biomass
d. symbiosis
