Blue - Ocean Food Chains and Food Webs

Blue - Ocean Food Chains and Food Webs

Lesson 1 of 7 in this unit

  • Secondary
  • Year 7 - 8
  • Science
  • Environmental
  • Conservation
  • Oceans
  • Water
  • ...

Lesson summary

This lesson incorporates clips from Blue The Film as learning inspiration. Students investigate the differences between food webs and food chains, and examine how these visual tools help us to understand the health of the oceans. Students begin by defining a range of key terms related to food webs and food chains, and then analyse models to identify the flow of energy. Students will then test the fragility of a food web, seeing what happens when species within that food web are removed. Finally, students examine some of the ways humans impact marine environments, working in groups to create a poster that describes a food chain of a marine species under threat from human behaviours.

Learning intentions:

Students will...

  • understand the difference between a food web and a food chain
  • understand how each species in a food web is integral to the health of the whole web
  • recognise how food webs can be used to help us understand the health of marine environments.

Success criteria:

Students can...

  • explain the difference between food webs and food chains
  • identify the trophic levels of food webs
  • undertake research online
  • produce a scientific poster.

Lesson guides and printables

Lesson Plan
Student Worksheet
Teacher Content Info

Lesson details

Curriculum mapping

Australian curriculum content descriptions:

Year 7 Science:

  • Interactions between organisms, including the effects of human activities can be represented by food chains and food webs (ACSSU112)

Syllabus outcomes: SC4-15LW

General capabilities: Critical and creative thinking

Cross-curriculum priority: Sustainability OI.2

Relevant parts of Year 7 Science achievement standards: Students predict the effect of human and environmental changes on interactions between organisms.

Unit of work: Blue The Film – Science – Year 7 & 8

Time required: 120 mins +

Level of teacher scaffolding: Medium – lead students in discussion and class activities, oversee group work.

Resources required


This lesson is designed to build students’ competencies in the following skills:

  • Collaboration
  • Communication
  • Creativity
  • Critical thinking
  • Problem solving

Additional info

Blue is a feature documentary film charting the drastic decline in the health of our oceans. With more than half of all marine life lost and the expansion of the industrialization of the seas, the film sets out the challenges we are facing and the opportunities for positive change. Blue changes the way we think about our liquid world and inspires the audience to action. Find out how to screen or download the film here. Along with the film is an ambitious global campaign to create advocacy and behaviour change through the #oceanguardian movement. To become an ocean guardian, see the website.

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