Lesson Notes By Weeks and Term - Junior Secondary 2

Materials and their common uses

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TERM – 1ST TERM

WEEK THREE

Class: Junior Secondary School 2

Age: 13 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC TECHNOLOGY

Topic:  MATERIALS AND THEIR COMMON USES

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

  1. Identify the Common Uses of Wood
  2. Identify the common uses of metals
  3. Identify the specific uses of ferrous and non-ferrous metals and their Alloys

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,

demonstration, videos from source

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

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher state and discuss the common uses of wood

Students pay

attention

STEP 2

EXPLANATION

Teacher state and discuss the common uses of metals

Students pay

attention and

participate

STEP 3

DEMONSTRATION

Teacher discusses the uses of ferrous and non-ferrous metal and their 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

MATERIALS AND THEIR COMMON USES

Uses of Wood

  1. Wood is widely used in building structures, framing, and for various construction purposes due to its strength and versatility.
  2. It's a primary material for crafting furniture, offering both durability and a pleasing aesthetic.
  3. Wood pulp is a major source for paper, used in books, newspapers, and packaging materials.
  4. Wood serves as a traditional source of fuel for heating and cooking, especially in residential settings.
  5. Wood is employed in various crafts and artistic endeavors, including sculptures, carvings, and intricate woodwork.
  6. Some tools are made from wood or incorporate wooden handles due to its resilience and ease of shaping.

Common uses of Metals

Metal is widely used in various applications due to its unique properties. Common uses include:

  1. Metals like steel and aluminum are vital in building structures, bridges, and infrastructure due to their strength and durability.
  2. Metals, particularly steel and aluminum, are extensively used in the automotive and aerospace industries for their lightweight yet robust characteristics.
  3. Copper and other metals are essential in electronic devices, providing conductivity for wiring and components.
  4. Aluminum is commonly used for packaging due to its lightweight nature, corrosion resistance, and ability to be easily shaped into various forms.
  5. Metals like titanium and stainless steel are used in medical implants and instruments due to their biocompatibility and resistance to corrosion.
  1. Metals like stainless steel and cast iron are popular for kitchenware due to their durability and heat-resistant properties.

Uses of Ferrous Metals:

  1. Steel (Iron and Carbon Alloy): Widely used in construction, automotive, machinery, and tools due to its strength, versatility, and durability.
  2. Cast Iron (Iron, Carbon, and Silicon Alloy): Utilized in cookware, pipes, and engine blocks for its high melting point and good castability.
  3. Stainless Steel (Iron, Chromium, Nickel Alloy): Commonly employed in kitchenware, cutlery, medical instruments, and construction due to its corrosion resistance.
  4. Wrought Iron (Iron with a small amount of Slag): Historically used in ornamental structures, gates, and railings due to its malleability and decorative qualities.

Uses of Non-Ferrous Metals

  1. Aluminum: Widely used in aerospace, automotive, and packaging industries due to its lightweight nature, corrosion resistance, and conductivity.
  2. Copper: Essential in electrical wiring, plumbing, and electronics due to its excellent conductivity and malleability.
  3. Brass (Copper and Zinc Alloy): Used for musical instruments, decorative items, and fittings due to its attractive appearance and corrosion resistance.
  4. Bronze (Copper and Tin Alloy): Employed in statues, bearings, and historically in tools and weapons due to its strength, corrosion resistance, and attractive color.
  5. Lead: Historically used in pipes and construction, now limited due to health and environmental concerns; still used in batteries and radiation shielding.
  6. Nickel Alloys (Various Metals including Nickel): Used in aerospace, chemical processing, and electronics due to their resistance to corrosion, high temperatures, and wear.

EVALUATION: 1. Mention 5 uses of wood

  1. Mention 5 uses of metals
  2. Identify 3 alloys of metals and state their uses.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively