Lesson Notes By Weeks and Term - Junior Secondary 1

TERM – 1^ST TERM

WEEK EIGHT

Class: Junior Secondary School 1

Age: 12 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC TECHNOLOGY

Topic: CLASSIFICATION OF METALS

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

1. Classify metals
2. Identify the forms of Metals
3. Identify the uses of metals.

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 discusses the various classes of metals	Students pay attention
STEP 2 EXPLANATION	Teacher identify and describe the various forms of metals	Students pay attention and participate
STEP 3 DEMONSTRATION	Teacher discusses uses of metals	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

CLASSIFICATION OF METALS

Metals can be classified in various ways based on different criteria. The following are  common classifications:

1. Chemical Composition:

   - Ferrous Metals: Contain iron as a primary constituent (e.g., iron and steel).

   - Non-Ferrous Metals: Do not contain iron as the primary constituent (e.g., aluminum, copper, and brass).

2. Density:

   - Heavy Metals: Have high densities, such as lead and mercury.

   - Light Metals: Have lower densities, including aluminum and magnesium.

3. Usage:

   - Base Metals: Common and widely used metals like copper, zinc, and nickel.

   - Precious Metals: Baluable and often rare metals like gold, silver, and platinum.

4. Magnetic Properties:

   - Ferromagnetic Metals: Display magnetic properties, like iron and nickel.

   - Non-Ferromagnetic Metals: Do not exhibit strong magnetic properties, such as aluminum and copper.

Forms of metals

Metals can exist in various forms, each tailored to specific applications. Here are common forms of metals:

1. Alloys - Combinations of two or more metals or a metal with non-metal elements. Examples include steel, bronze, and brass.
2. Metal Sheets and Plates - Flat, thin pieces of metal often used in construction, manufacturing, and fabrication.
3. Metal Bars - Solid, elongated pieces of metal with various cross-sectional shapes. Used in construction and as structural elements.
4. Metal Wires- Long, thin strands of metal used for electrical wiring, fencing, and various applications.
5. Metal Tubes and Pipes- Hollow structures often used in plumbing, construction, and industrial processes.

Uses of metals

Metals have a wide range of uses across various industries due to their unique properties. Here are some common applications:

1. Construction - Steel and aluminum are widely used in construction for structural components, framing, and roofing.
2. Transportation - Metals such as steel, aluminum, and copper are essential in the manufacturing of vehicles, aircraft, and ships.
3. Energy - Metals like copper and aluminum are used in electrical conductors, and steel is crucial for the construction of power plants.
4. Manufacturing - Metals play a vital role in manufacturing machinery, tools, and equipment for various industries.
5. Jewelry and Currency - Precious metals like gold, silver, and platinum are used for making jewelry and coins.
6. Infrastructure - Metals are essential in the construction of bridges, pipelines, and other critical infrastructure.

EVALUATION: 1. Classify metals based on their magnetic properties.

2. Mention 5 forms which metals come in.
3. Identify 5 uses of metals that you know.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively