Materials · B2 Science

Lesson notes

Learning Objectives

Indicator: B2.1.2.3.1

By the end of the lesson, learners can:

Describe a solid-solid mixture as a combination of two or more solid materials that can be seen and identified separately.
Form solid-solid mixtures by combining given solid materials in pairs and observing what happens.
State that no new material is formed when solid materials are mixed together.
Explain at least one method of separating a given solid-solid mixture based on the properties of the components.
Apply the idea of separating solid-solid mixtures to everyday situations such as removing stones from gari or sand from groundnuts.

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Curriculum details

Strand: Diversity of Matter (Strand 1)
Sub-strand: Materials (1.2)
Content standard: B2.1.2.3 - Understand mixtures, the types, their formation, uses and ways of separating them into their components
Indicator: B2.1.2.3.1 - Describe a solid-solid mixture and explain how to separate the components
Suggested placement: Term 1, Week 8 (Week 8 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. 38
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

- Learners watch a video and pictures on solid-solid mixtures
- Provide learners with solid materials for them to observe, e.g. sand, gari, saw dust, chalk, charcoal and cowpea.
- Learners combine two materials at a time and observe what happens
- Learners talk about the mixtures they have formed
- Ask learners whether the products they have formed are the same as the individual materials. How will they call the material combinations they have formed?
- Assist learners to understand that when they mix two or more things together, they form a mixture and that no new thing forms even though the starting and ending substances may look different from each other.
- Explain to learners that they have formed a solid-solid mixture
- Learners explore ways of separating the components of the solids-solid mixtures they have prepared
- Provide more solid materials for learners to do more group activities
- Relate the lesson to everyday life. For example, separation of a mixture of groundnut and sand, sand and stone, and maize and chaff, roasted groundnut and its husks
- Learners to separate some common solid-solid mixtures such as sand and stone, iron nails and sand, gari and groundnut.