Lesson Notes By Weeks and Term - Junior Secondary 1

Properties of material

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TERM – 1ST TERM

WEEK FIVE

Class: Junior Secondary School 1

Age: 12 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC TECHNOLOGY

Topic: PROPERTIES OF MATERIAL

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Define and identify various materials.
  2. Identify the characteristics of wood.
  3. Identify the classes of wood.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,

demonstration, videos from source

INSTRUCTIONAL MATERIALS:  Videos, loud speaker, textbook, pictures, wood.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher explains the meaning of materials to the students and state examples

Students pay

attention

STEP 2

EXPLANATION

Teacher discuss the characteristics of wood as a means of Identification.

Students pay

attention and

participate

 

STEP 3

DEMONSTRATION

Teacher identify and discuss the classes of wood.

Students pay

attention and

participate

STEP 4

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

PROPERTIES OF MATERIAL

A material is a substance of which things are composed or made. It can refer to anything with mass and volume, ranging from metals and plastics to liquids and gases. Materials have specific properties that determine their behavior and uses in various applications.examples of materials include; Metals, Plastics, Ceramics, Wood, Rubber, Glass and ceramics.

Wood

Wood is a natural material derived from the stems and branches of trees. It is widely used in construction, furniture, and various crafts. Wood has diverse types, each with unique properties.

Identification of wood.

Wood identification involves examining various characteristics to determine the type of wood. Some key factors for identification include:

  1. Grain Pattern: The arrangement of wood fibers, such as straight, interlocked, or spiral grain.
  2. Color: Different wood species have distinctive colors, which may change over time due to aging or exposure.
  3. Texture: The feel or surface characteristics, ranging from coarse to fine.
  4. Density: The weight of the wood compared to its volume; hardwoods are generally denser than softwoods.
  5. Odor: Some woods have a distinct scent, aiding in identification.

Classification of wood

Wood is classified based on various factors, and two primary classifications are hardwood and softwood:

  1. Hardwood: Hardwood are derived from deciduous trees (angiosperms) that usually lose their leaves in the fall. They are typically denser and harder, often used for furniture and flooring. Examples of hardwood include: Oak, maple, mahogany, and cherry.
  2. Softwood: Softwood are derived from evergreen trees (gymnosperms) that usually have needles instead of leaves. They are generally less dense and softer, commonly used in construction and for making paper. Examples of softwood are: Pine, spruce, cedar, and fir.

EVALUATION: 1. Define materials and give examples

  1. Identify 5 characteristics of wood
  2. Identify and describe the 2 types of wood give examples in each case.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively