Earth Science · JHS2 Science

Lesson notes

Learning Objectives

Indicator: B8.2.1.1.2 - Describe the role of the carbon cycle to the environment.

By the end of the lesson, learners can:

Explain how the carbon cycle maintains a balance in the composition of air in the environment.
Describe the roles of photosynthesis and respiration in the carbon cycle using the terms “carbon (IV) oxide” and “oxygen” correctly.
Use a simple food chain diagram to show how carbon moves from plants to animals and back to the environment.
Explain the relationship between greenhouse gases, especially carbon (IV) oxide, and the carbon cycle.
Evaluate how human activities can disrupt or restore the carbon balance in the environment.

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Curriculum details

Strand: Cycles (Strand 2)
Sub-strand: Earth Science (2.1)
Content standard: B8.2.1.1 - Demonstrate understanding of the process of Carbon cycle as an example of repeated pattern of change in nature and how it relates to the environment
Indicator: B8.2.1.1.2 - Describe the role of the carbon cycle to the environment.
Suggested placement: Term 1, Week 6 (Week 6 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. 58
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Describe the role of the carbon cycle in maintaining balance in the composition of air in the environment. E.g. plants absorb carbon in the form of Carbon (IV) Oxide from the air for photosynthesis and oxygen is produced for respiration and in return, respiration gives out carbon in the form of Carbon (IV) Oxide.
Note: Discuss photosynthesis and respiration in plants as part of the carbon cycle.
2. Explain the effect of the carbon cycle on food chains, using diagrams.
3. Describe the relationship between greenhouse gases and the carbon cycle.