Lesson Notes By Weeks and Term - Junior Secondary 1

Properties of material - metals

Get it on Google Play
Get it on the Apple App Store
  1. Home
  2. Lesson Notes By Weeks and Term
  3. Junior Secondary 1
  4. Properties of material - metals

TERM – 1ST TERM

WEEK SEVEN

Class: Junior Secondary School 1

Age: 12 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC TECHNOLOGY

Topic: PROPERTIES OF MATERIAL - METALS

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

  1. Define metals
  2. Identify metals by their Physical Properties
  3. Identify the types of metals
  4. Describe and identify alloys.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,

demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures, metal materials.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher introduce metals and identify examples of metals.

Students pay

attention

STEP 2

EXPLANATION

Teacher discusses the physical properties and types of metals

Students pay

attention and

participate

STEP 3

DEMONSTRATION

Teacher discusses alloys and identify common alloys

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 - METALS

Metals are elements that exhibit conductivity, malleability, and ductility. Common metals include iron, aluminum, and copper. They play crucial roles in construction, manufacturing, and various industrial applications.

Identification by their physical properties.

Metals can be identified by various physical properties:

  1. Conductivity: Most metals are good conductors of electricity and heat.
  2. Malleability: Metals can be hammered or rolled into thin sheets without breaking.
  3. Ductility: They can be drawn into wires without breaking.
  4. Luster: Metals often have a shiny appearance due to their ability to reflect light.
  5. Melting Point: Metals typically have high melting points.
  6. Color: Some metals exhibit characteristic colors. For example, copper has a distinctive reddish-brown color.
  7. Magnetism: Some metals, like iron and nickel, are attracted to magnets.

Types of metals

There are two main types of metals:

  1. Ferrous Metals: Contain iron as the primary component. Common examples include iron and steel. They are known for their strength and durability.
  2. Non-Ferrous Metals: Do not contain iron as the primary component. Examples include aluminum, copper, and brass. Non-ferrous metals often have desirable properties like corrosion resistance and are used in various applications.

Alloys

Alloys are mixtures of two or more elements, with at least one of them being a metal. Here are some common alloys:

  1. Steel: Iron combined with carbon and other elements. It's known for its strength and versatility.
  2. Bronze: Copper alloyed with tin, and sometimes other elements. It's corrosion-resistant and historically used for statues and tools.
  3. Brass: Copper alloyed with zinc. Brass is valued for its bright gold-like appearance and is used in musical instruments, decorative items, and fittings.

EVALUATION: 1. What are metals. Give examples of metals

  1. Identify 5 properties of metals
  2. Discuss the 2 types of metals
  3. Identify 2 alloys you know and describe how they are formed.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively