Materials · JHS2 Science

Lesson notes

Learning Objectives

Indicator: B8.1.1.1.1 - Identify types of mixtures by name and characteristics

By the end of the lesson, learners can:

Classify everyday materials such as salt, sand, gari, oil, water, pebbles and gravel into solids and liquids based on observable physical characteristics.
Define a mixture as a combination of two or more substances that can be separated by physical means.
Differentiate between homogeneous mixtures and heterogeneous mixtures by observing the appearance of mixtures such as sand and water, and salt dissolved in water.
Identify solutions, suspensions and colloids as types of mixtures and state at least one characteristic feature of each.
Compare solutes and solvents in a solution, identifying which component is dissolved and which does the dissolving.

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Curriculum details

Strand: Diversity of Matter (Strand 1)
Sub-strand: Materials (1.1)
Content standard: B8.1.1.1 - Demonstrate knowledge of types of mixtures, and understanding of the processes of scientific ways of separating the components of mixtures
Indicator: B8.1.1.1.1 - Identify types of mixtures by name and characteristics
Suggested placement: Term 1, Week 1 (Week 1 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. 52
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Group materials such as powder, pebbles, bottle tops, salt, sugar, sand, gari, gravel, oil, water and others into two main categories: solids and liquids.
2. Put any two of the materials (in 1) together and describe the resultant nature of the product formed.
3. Draw observable conclusions on homogeneous and heterogeneous characteristics from mixtures of two or more materials such as sand and gravel; sand and water; oil and water.
4. Compare and contrast solutes and solvents based on their physical characteristics.
5. Identify and separate mixtures such as sand and sugar mixture, sugar and salt mixture and solutions such as salt solution, sugar solution, fruit juice, vinegar solution based on their physical properties.
6. Identify a suspension as a type of mixture e.g. mixture of groundnut paste and water in a glass.
7. Differentiate between a colloid and a suspension and show the colloidal effect.