Daily TAKS Connection: Food Chains, Food Webs, and Food Pyramids

1
Daily TAKS ConnectionFood Chains, Food Webs,
and Food Pyramids

• BIO (12) The student knows that interdependence
  and interactions occur within an ecosystem. The
  student is expected to
• (E) Investigate and explain the interactions in
  an ecosystem including food chains, food webs,
  and food pyramids.

2
Foldable Instructions

• Construct a 3 door foldable Food Chains, Food
  Webs, Food Pyramids
• Materials
• 1 sheet paper
• Scissors
• Pen
• Colored pencils/crayons
• Food web illustration
• Glue/tape

• Instructions
• Hotdog fold a sheet of paper
• Hamburger fold the paper 2 times to evenly divide
  the paper into thirds
• Cut along the fold lines from the edge to the
  valley.
• Label the bottom of the flaps from left to right
  Food Chain, Food Web, and Food Pyramid

3
Notes

• Under the Food Chain flap, record the
  following
• route for the transfer of matter and energy
  through an ecosystem
• arrows ALWAYS point to the organisms receiving
  the energy (food). Example
• Producer -gt primary consumer -gt secondary
  consumer -gttertiary consumer

4
Notes continued.

• Under the Food Web flap, record the following
• shows all possible feeding relationships in a
  community at each trophic level.
• a network of interconnected food chains. The
  arrows ALWAYS point to the organisms receiving
  the energy (food).
• Under the Food Pyramid flap, record the
  following
• Shows the relationship between food energy
  available at the trophic levels from bottom to
  top producer, primary consumer, secondary
  consumer, tertiary consumer
• Less energy available at higher trophic level
  most energy at producer level
• More pollutants at higher trophic levels

5
Question 1

• In a typical forest community, plants are
  producers, rabbits are primary consumers, and
  wolves are secondary consumers. Which diagram
  correctly represents these relationships?

a c
b d
6
Question 2

• The difference in the size of each layer of this
  food pyramid is primarily the result of the
  difference in
• a. food choices of individual niches
• b. the amount of food energy at each trophic
  level
• c. oceanic zones of habitat
• d. the relative heights of the organisms

7
Question 3

• Which of these groups of organisms would most
  likely have accumulated the largest concentration
  of a long-lasting chemical pollutant in their
  bodies?
• a. Phytoplankton
• b. Lake trout
• c. Zooplankton
• d. Gulls

8
Food Chain Food Pyramid

• On the flap labeled Food Chain, draw a food
  chain from the food web provided on the center
  flap. Be sure the arrows are pointing in the
  correct direction.
• On the flap labeled Food Pyramid, draw a food
  pyramid from the food web provided, placing the
  organisms at the correct trophic level

9
Foldable Activity

• For the food web provided, name the
• 3 herbivores
• 1 omnivore
• 10 carnivores
• Note omnivores are also herbivores and
  carnivores

10
Foldable Activity

• For the food web provided, name the
• 3 producers
• 3 primary consumers
• 7 secondary consumers
• 5 tertiary consumers
• Note Organisms may appear in more than one
  trophic level.
• Which organism(s) is/are also a 4th level
  consumer?

11
Question 4

• According to this food web, which of these is an
  omnivore?
• a. Caterpillar
• b. Ant
• c. Deer
• d. Bird

12
Decomposers

• mainly bacteria and fungi that break down and
  obtain energy from dead organic matter
• essential to the environment
• recycle nutrients
• fix unusable nitrogen gas into a usable form
  which will be picked up by plants
• Add decomposers to your food web.

13
Question 5

• The picture shows a piece of rotting wood. Which
  of these does the picture demonstrate?
• a. Photosynthesis occurring
• b. Decomposers growing
• c. Wood regenerating
• d. Genes transforming

14
Abiotic Biotic Notes

• Classify the following ecosystems factors as
  either Biotic or Abiotic

Soil Producers Light Primary Consumers
Secondary consumers Air Rainfall Water
15
Question 6

• The table lists four groups of factors found in a
  particular ecosystem. Which group consists of
  only abiotic factors?
• a. Group 1
• b. Group 2
• c. Group 3
• d. Group 4