B5 Science · Term 1 Week 5: Materials

Lesson notes

Learning Objectives

Indicator: B5.1.2.3.1 - Demonstrate formation and separation of mixtures (solid-liquid and liquid-liquid mixtures)

By the end of the lesson, learners can:

Define a mixture and identify the two components (solid and liquid, or liquid and liquid) in a given mixture.
Form solid-liquid mixtures (e.g., sand and water, salt and water) and liquid-liquid mixtures (e.g., cooking oil and water) by adding substances to water and stirring.
Describe the observable differences between a mixture of sand and water, and a mixture of salt and water.
Distinguish between a mixture of water and soft drink, and a mixture of water and cooking oil.
Demonstrate at least two methods of separating mixtures, such as filtration, evaporation, sieving, or use of a separating funnel, to recover the components.

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Curriculum details

Strand: Diversity of Matter (Strand 1)
Sub-strand: Materials (1.2)
Content standard: B5.1.2.3 - Understand mixtures, the types, formation, uses and ways of separating them into their components
Indicator: B5.1.2.3.1 - Demonstrate formation and separation of mixtures (solid-liquid and liquid-liquid mixtures)
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 Curriculum (Basic 4-6), 2019, p. 19
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

- Display some solid and liquid substances for learners to observe, e.g. water, common salt, vinegar, sugar, sand, cooking oil and soft drinks.
- Put learners in groups and ask them to add each of the substances to a separate quantity of water whilst stirring and observe what happens.
- Learners describe the material combinations they have produced, i.e. as solid-liquid mixture, liquid-liquid mixture or a solution.
- Learners find out the difference between a mixture of sand and water and a mixture of salt and water.
- Learners also differentiate between the mixture of water and soft drink and the mixture of water and cooking oil.
- Put learners into groups to demonstrate how to recover the salt from the salt solution.
- Assist learners to separate different solid-liquid mixtures and liquid-liquid mixtures using separation methods such as filtration, evaporation, sieving and use of separating funnel.
Project: Separation of solid- liquid mixture Learners separate a mixture of sand and water using appropriate materials.
NB: Improvised separation equipment can be used to effectively separate various mixtures