Earth Science · B3 Science

Lesson notes

Learning Objectives

Indicator: B3.2.1.4.1 - Identify things that make water impure

By the end of the lesson, learners can:

Define impure water as water that contains harmful substances or materials that make it unsafe to use or drink.
Identify at least five different things that make water impure, such as rubbish, chemicals, animal waste, and factory waste.
Classify the causes of water impurity into groups, such as waste from homes, waste from farms, and waste from factories or mines.
Explain what can happen to people who drink impure water.
Communicate ideas about water impurity through group discussion and picture observation, building on the cyclic events and precipitation concepts learned in previous weeks.

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Curriculum details

Strand: Cycles (Strand 2)
Sub-strand: Earth Science (2.1)
Content standard: B3.2.1.4 - Recognise water and air as important natural resources
Indicator: B3.2.1.4.1 - Identify things that make water impure
Suggested placement: Term 1, Week 12 (Week 12 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 Curriculum (Basic 1-3), 2019, p. 53
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

- Provide learners with cut-out pictures showing how water is polluted. This should include leakages, flooding during rainy season which carries waste deposits into water bodies, Industrial waste dumped into water, mining, littering, pesticides application, fertilizer application, house hold chemicals, improper disposal of animal wastes.
- In groups, learners observe the pictures and communicate their ideas on what makes water impure.
- Take learners on a trip to observe littered parts of the community to identify things that make water impure.
- Ask learners what will happen if they drink impure water.