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SubjectPaid lesson

Properties of materials II

ClassNotes Team 2 MIN READUPDATED 16 JUN 2026

BASIC SCIENCE JSS1 First term

Sub-Theme: Safety, Material and Processing

Theme Understanding Basic Science and Technology

WEEK 8

Properties of materials 2

Performance objectives

Students should be able to:

  1. List and explain the two classifications of wood.
  2. Give the difference between hardwood and softwood
  3. List the uses of wood.

Content

Classification of wood

Wood is broadly classified into

  1. Hardwood
  2. Softwood
  1. Hardwood: they are also known as deciduous trees which has broad leaves that are shed annually in the dry season to prevent loss of water e.g. insomnia, mahogany, afara, omo, beech, obeche etc.
  2. Softwood: they are also known as coniferous trees that have needle-like leaves which do not shed annually and are evergreen in nature. E.g. spruce, pine, fir,…