Food Chains & Food Webs

Lesson Plan

State Standards:

6.3 Use a food web to identify and distinguish producers, consumers, and decomposers, and explain the transfer of energy through trophic levels. Describe how relationships among organisms (predation, parasitism, competition, commensalism, mutualism) add to the complexity of biological communities.

6.2 Analyze changes in population size and biodiversity (speciation and extinction) that result from the following: natural causes, changes in climate, human activity, and the introduction of invasive, non-native species.

Essential Question:

How do ecoystems work?

Lesson Question:


Students will investigate relationships between predator and prey, how organisms can occupy different trophic levels, and how humans can impact a food web.


Students will create a food web with at least sixteen different organisms. They will research different organisms to create the food web, then apply a human interaction such as pesticides and observe how this changes the food web. This will be a partner project. Names will be drawn out of a "hat" to choose the partners. Everyone in the class will complete the video and quizlet portion of their own and the research and prezi portion will be in the groups of two.

Lesson Experiences:

  1. Watch the following video:


2. Use the Quizlet flashcards to practice the vocabulary words introduced by the video.

Biology Ecology

Study these flash cards | Study biology flash cards

3. Then take a quick online quiz to check your understanding and submit to instructor. Quiz can be retaken by rewatching the video.

4. Use the following websites to collect data on 16 organisms that would be in the same food website, all information can be gained from these two sites. You may base your web on the ecosystem featured in the video but are not required to do so.

    1. Animals must have a connection through the predator/prey relationship
    2. Information to collect:
      1. Genus/species/name
      2. Location
      3. Diet
      4. Prey
      5. Predators


      Collect data and post to a Google Doc
        The instructor will inform you of the type of human impact (ie. hunting, pesticides that will kill off one organism in your web)

5. Create a Prezi that shows a food web with all of the organisms you chose in your data collection

Example: Food Web on Prezi

What to possibly include in your Prezi?

6. Also create a secondary web that shows the influence of humans. You may think about playing with the relative size of the word/photo to show that there may be a decline or increase of an organism's population.

7. Share the Prezi with your instructor and the class.


Now you know about food webs, explain how they change with different members and over time. How can you see and describe them in your daily life?


Prezi presentation of food web

Assessment Rubric






Clarity and neatness

Prezi easy to read all elements clearly written/labeled

Prezi easy to read, most elements are clearly written

Prezi hard to read with rough photos and labels

Prezi is hard to read and cannot tell what goes where

Visual Presentation

Exceptional attention to detail

visually pleasing, small details could have been refined

average, many details could be refined

Careless & messy unattractive

Spelling & Grammar

NO mistakes

no more than 2 mistakes

no more than 4 mistakes

more than 4 mistakes


All content is student generated and clearly cited, 2 complete food webs made

content is student generated, mostly complete food webs

content is mostly student's own words, food webs @ 75%

content may not all be in student's own words incomplete webs

Science knowledge

demonstrate clear understanding of food web, all connections made

fairly accurate, 90% of connections made

limited accuaracy, 75% connections made

less than 1/2 of connections made, little understanding

Human Impact portion

All organisms affected are removed or size of font changed to reflect growth or decline in population

Most organisms affected are removed or size of font changed to reflect growth or decline in population

Few organisms affected are removed or size of font changed to reflect growth or decline in population

Little to no changes in food web