In this activity, students build their own food web using images of organisms from the marine ecosystem. This activity can be done indoors on paper or outdoors on a tarmac surface using chalk.

By the end of this activity, students should be able to:

  • understand the difference between a food chain and a food web
  • understand that food webs are made up of producers, consumers and decomposers
  • build and revise their own food web to show the interdependence of organisms in an ecosystem
  • understand the potential impact of the removal or reduction of one species on the rest of the food web.

Download the Word file (see link below) for:

  • introduction/ background notes
  • what you need
  • what to do
  • discussion questions
  • possible variations
  • student worksheet
  • trophic pyramid diagram
  • tuna sandwich diagram (transfer of energy)
  • organism cards (small)
  • organism cards (large).

My kids have been making arrows to add to a poster of a foodweb and are then going to teach the lesson to another group within the class, they love the fact they are teaching others.

Year 5/6 teacher

Useful links

These two websites have more information about common student alternative conceptions related to food webs.

Science Continuum

Binghamton University

    Published 12 October 2009