1. Obtain a 50cm x 50cm piece of construction paper to be used as poster paper.
2. Write the first and last names of each person in your group on the upper-right hand corner of your
poster. Include the period number and date.
3. Use scissors to cut out the picture cards on pages 4, 5, and 6 of this handout.
4. Find the Color Key card. Use different colors to color each of the triangles on the card.
5. Paste the Color Key Card on the bottom right corner of the poster paper.
6. Find the sun card and paste it to the upper-left corner of your poster paper.
7. Sort the remaining picture cards into groups according to the following trophic levels: producers,
primary consumers, secondary consumers, and tertiary consumers. For example, plants are
producers, snails are primary consumers, crayfish are secondary consumers, and turtles are tertiary
consumers.
8. Color the triangles in the upper right-hand corner of each picture card according to the type of
trophic level that each organism falls under.
9. Decide on 15 picture cards in which to construct a food web. Your food web must have at least two
organisms from each trophic level.
10. Arrange the 12 picture cards on your poster paper and then glue them in place. Use arrows to
show that energy is passed from one living organism to another (arrows go from the plant or
animal that is eaten to the animal doing the eating).
11. An example of a marine food web is shown below.