Ecosystem · JHS2 Science

Lesson notes

Learning Objectives

Indicator: B8.3.3.1.1

By the end of the lesson, learners can:

Explain what life on Earth would be like without the sun, using evidence from their own observations.
Define the terms producer, primary consumer, secondary consumer, food chain and food web in their own words.
Construct a simple food chain showing at least three trophic levels, with arrows correctly indicating the direction of energy flow.
Trace the flow of energy from the sun through a food chain and explain what happens to the energy at each step.
Distinguish between a food chain and a food web using examples from a Ghanaian ecosystem they are familiar with.

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Curriculum details

Strand: Systems (Strand 3)
Sub-strand: Ecosystem (3.3)
Content standard: B8.3.3.1 - Demonstrate an understanding of the interdependence of organisms in an ecosystem and their interaction
Indicator: B8.3.3.1.1 - Explore the feeding relationships within an ecosystem
Suggested placement: Term 2, Week 3 (Week 15 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Science, Common Core Programme (JHS1-JHS3), 2023, p. 67
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Discuss how life on earth will be like without the sun.
2. Explain the terms: producer, primary consumer, secondary consumer, food chain and food web as applied in energy transfer in an ecosystem.
3. Illustrate with diagrams how energy from the sun flows through a food chain and food web in an ecosystem.