Earth Sciences · JHS3 Science

Lesson notes

Learning Objectives

Indicator: B9.2.1.1.1

By the end of the lesson, learners can:

Identify the nitrogen cycle and its key stages from diagrams, charts, or digital sources.
Explain the five main processes of the nitrogen cycle: nitrogen fixation, nitrification, assimilation, ammonification, and denitrification.
Describe how the nitrogen cycle connects living organisms (plants and animals) to the non-living environment (air, soil, water).
Explain why the nitrogen cycle is a repeated pattern in nature, using examples from familiar surroundings such as farms and gardens.
Sequence the stages of the nitrogen cycle correctly on a simple diagram or flowchart.

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Curriculum details

Strand: Cycles (Strand 2)
Sub-strand: Earth Sciences (2.1)
Content standard: B9.2.1.1 - Demonstrate an understanding of the Nitrogen cycle as a repeated pattern of change in nature, and how it relates to the environment
Indicator: B9.2.1.1.1 - Explain the process of the nitrogen cycle as a repeated pattern in nature
Suggested placement: Term 1, Week 5 (Week 5 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. 92
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Identify the nitrogen cycle from the internet, charts, or pictures.
2. Explain the nitrogen cycle depicting processes such as:
- Nitrogen fixation
- Nitrification (converting ammonia into nitrates).
- Assimilation (plants and animals using nitrogen)
- Ammonification (adding organic nitrogen compounds to ammonia or ammonia formation).
- De-nitrification.
3. Explain the relationship between the nitrogen cycle and the environment.
4. Explain why the nitrogen cycle is a repeated pattern in nature.