Lesson Notes By Weeks and Term - Junior Secondary 2

Materials and their common uses II

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TERM – 1ST TERM

WEEK FOUR

Class: Junior Secondary School 2

Age: 13 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC TECHNOLOGY

Topic:  MATERIALS USED THEIR COMMON USES II

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

  1. Identify the uses ceramics/Glass
  2. Identify the uses of Rubber
  3. Identify the uses of Plastics

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 identifies and discusses the uses of ceramics/glass

Students pay

attention

STEP 2

EXPLANATION

Teacher state and discuss the uses of Rubber

Students pay

attention and

participate

STEP 3

DEMONSTRATION

Teacher discusses the uses of Plastics.

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

COMMON USES OF CERAMICS

  1. Ceramics are used in tiles, bricks, and structural components due to their durability, resistance to heat, and corrosion.
  2. Ceramic materials are employed in capacitors, insulators, and semiconductor components due to their electrical insulating properties.
  1. Ceramics like alumina and zirconia are used in dental implants and prosthetics due to their biocompatibility and strength.
  2. Hard ceramics such as alumina and silicon carbide are utilized in cutting tools and abrasives for their hardness and wear resistance.
  3. Ceramics with high melting points are used in the lining of furnaces and kilns due to their ability to withstand extreme temperatures.
  4. Traditional uses include dishes, cups, and decorative pottery due to ceramics' versatility in molding and firing.

Common uses of Glass

  1. Glass is used in windows, doors, and architectural designs for its transparency, allowing natural light and aesthetic appeal.
  2. Glass bottles and jars are widely used for packaging beverages, food, and pharmaceuticals due to their impermeability and recyclability.
  3. Glass is used in the manufacturing of displays, lenses, and fiber optics due to its optical clarity and electrical insulating properties.
  4. Used for windshields, windows, and mirrors due to its transparency, durability, and scratch resistance.
  5. Glass is commonly used in scientific laboratories for beakers, test tubes, and other containers due to its inert nature and transparency.

Common uses of Rubber

Rubber has versatile applications across various industries due to its unique properties. Some common uses of rubber include:

  1. Rubber is a key component in tire production due to its elasticity, durability, and ability to provide traction.
  2. Shoe soles and components often use rubber for its cushioning, flexibility, and resistance to wear and tear.
  3. Rubber is used in manufacturing conveyor belts and hoses for industries like agriculture and manufacturing.
  4. Rubber's sealing properties make it ideal for creating gaskets and seals in various applications, preventing leaks and ensuring tight closures.
  5. Various automotive components, such as engine mounts, seals, and grommets, are made from rubber due to its ability to absorb vibrations and resist chemical exposure.
  6. Rubber-based adhesives are widely used in bonding materials due to their strong and flexible nature.
  7. Elastic bands, erasers, and various household items use rubber for its flexibility and resilience.

Common uses of Plastics.

Plastics are widely used in numerous industries due to their versatility, lightweight nature, and durability. Common uses of plastics include:

  1. Plastics are extensively used in packaging materials such as bottles, containers, bags, and films due to their lightweight and protective properties.
  2. Plastics find applications in construction for pipes, insulation materials, roofing, and window frames due to their durability and resistance to corrosion.
  3. Many everyday items like toys, kitchenware, and electronic devices use plastics for their cost-effectiveness, ease of molding, and lightweight nature.
  4. Plastics are crucial in the healthcare industry for manufacturing medical devices, including syringes, IV tubes, and packaging for pharmaceuticals, due to their sterilizability and safety.
  5. Plastics are used in car interiors, dashboards, bumpers, and various components to reduce weight and improve fuel efficiency.
  6. Plastic casings are common in electronic devices due to their electrical insulation properties and ease of manufacturing.
  7. Plastic containers and packaging are popular for storing and transporting food due to their lightweight nature and sealing capabilities.

EVALUATION: 1. Mention 5 uses of ceramics

  1. Mention 5 uses of Rubber
  2. Mention 5 uses of Plastics

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively