Rubber and Plastics Properties and Uses Basic Technology JSS 1 First Term Lesson Notes Week 10

Basic Technology JSS 1 First Term Lesson Notes – Week 10

Subject: Basic Technology

Class: JSS 1

Term: First Term

Week: 10

Age: 10 – 12 years

Topic: Rubber and Plastics

Sub-topics:

I. Types of Rubber and Plastics
II. Identification of Rubber and Plastics
III. Properties of Rubber and Plastics
IV. Uses of Rubber and Plastics

Duration: 40 minutes

Behavioural Objectives:

By the end of the lesson, students should be able to:

Identify different types of rubber and plastics.
Describe the properties of rubber and plastics.
Explain the uses of rubber and plastics in everyday life.

Keywords:

Rubber
Plastics
Types
Properties
Uses
Identification

Set Induction:

Show common items made from rubber and plastics, such as a rubber band, plastic bottle, and plastic bag. Ask students what materials these items are made from.

Entry Behaviour:

Students have used various rubber and plastic items in daily life but may not be familiar with their types and properties.

Learning Resources and Materials:

Samples of rubber items (rubber bands, tires)
Samples of plastic items (bottles, bags)
Charts showing types and properties of rubber and plastics

Building Background/Connection to Prior Knowledge:

Students have learned about materials like metals, ceramics, and glass. This lesson will expand their knowledge to include synthetic materials such as rubber and plastics.

Embedded Core Skills:

Observation
Analysis
Classification

Reference Books:

Lagos State Scheme of Work
Basic Technology Textbook for JSS 1

Instructional Materials:

Rubber bands
Plastic bottles
Plastic bags
Charts

Content:

I. Types of Rubber and Plastics

Types of Rubber:
- Natural Rubber: Made from latex, used in tires, shoes, and medical gloves.
- Synthetic Rubber: Man-made, used in car tires, seals, and gaskets.
Types of Plastics:
- Thermoplastics: Can be melted and reshaped multiple times. Examples include polyethylene (used in plastic bags) and polyvinyl chloride (PVC, used in pipes).
- Thermosetting Plastics: Harden permanently after being shaped. Examples include epoxy resins (used in adhesives) and phenolic resins (used in electrical insulators).

II. Identification of Rubber and Plastics

Rubber: Typically flexible, stretchable, and has a rubbery texture.
Plastics: Usually rigid or flexible depending on the type, with a smooth surface and can be transparent or opaque.

III. Properties of Rubber and Plastics

Rubber Properties:
- Elasticity: Rubber can stretch and return to its original shape.
- Durability: Resistant to wear and tear.
- Water Resistance: Rubber is generally resistant to water and moisture.
Plastic Properties:
- Lightweight: Plastics are lighter compared to many other materials.
- Versatility: Plastics can be molded into various shapes and forms.
- Resistance to Chemicals: Many plastics resist damage from chemicals.
- Durability: Plastics are durable and can last a long time if not exposed to harsh conditions.

IV. Uses of Rubber and Plastics

Uses of Rubber:
- Automotive: Used in tires, seals, and hoses.
- Medical: Used in gloves, bandages, and surgical equipment.
- Household Items: Used in rubber bands, erasers, and mats.
Uses of Plastics:
- Packaging: Used in bags, bottles, and containers.
- Construction: Used in pipes, fittings, and insulation materials.
- Electronics: Used in electrical insulation and components.
- Consumer Goods: Used in toys, kitchen utensils, and furniture.

Evaluation (Fill-in-the-blank questions):

Natural rubber is made from __________.
a) plastic b) metal c) latex d) glass
Synthetic rubber is __________.
a) man-made b) found in nature c) edible d) heavy
__________ plastics can be melted and reshaped multiple times.
a) Thermoplastics b) Thermosetting c) Natural d) Recycled
Epoxy resins are an example of __________ plastics.
a) thermoplastics b) thermosetting c) natural d) synthetic
Plastics are generally __________.
a) lightweight b) heavy c) transparent d) weak
Rubber is known for its __________.
a) rigidity b) elasticity c) brittleness d) opacity
PVC is a type of __________.
a) rubber b) glass c) plastic d) metal
Thermosetting plastics __________ after being shaped.
a) melt b) remain soft c) harden permanently d) dissolve
One common use of rubber is in __________.
a) car tires b) glass bottles c) wooden furniture d) ceramic tiles
__________ plastics are used in packaging materials like bags and bottles.
a) Thermoplastics b) Thermosetting c) Natural d) Metal
Rubber is generally __________ to water and moisture.
a) resistant b) conductive c) reactive d) permeable
Plastics that resist chemicals are called __________.
a) reactive b) versatile c) durable d) resistant
Natural rubber is commonly used for __________.
a) car tires b) plastic bags c) electronic components d) medical gloves
Which property of rubber allows it to return to its original shape after stretching?
a) Elasticity b) Durability c) Lightweight d) Rigidness
__________ plastics are used in construction materials like pipes and fittings.
a) Thermoplastics b) Thermosetting c) Natural d) Rubber

Class Activity Discussion (FAQs):

What is natural rubber made from?
Natural rubber is made from latex.
What are synthetic rubbers?
Synthetic rubbers are man-made and used in various applications like tires and seals.
What is the main difference between thermoplastics and thermosetting plastics?
Thermoplastics can be melted and reshaped, while thermosetting plastics harden permanently after shaping.
What are some common uses of rubber?
Rubber is used in car tires, medical gloves, and rubber bands.
How can you identify plastic materials?
Plastics can be identified by their smooth surface and can be either rigid or flexible.
Why are plastics used in packaging?
Plastics are used in packaging because they are lightweight, durable, and can be molded into various shapes.
What makes rubber elastic?
Rubber is elastic due to its ability to stretch and return to its original shape.
What is one property of plastics that makes them suitable for electrical insulation?
Plastics are resistant to chemicals and can be used as electrical insulators.
What is an example of a thermosetting plastic?
Epoxy resins are an example of thermosetting plastics.
How do plastics benefit the construction industry?
Plastics are used in construction for pipes, fittings, and insulation materials due to their versatility and durability.
What makes rubber water-resistant?
Rubber’s structure provides a barrier against water and moisture.
What are some uses of thermoplastics?
Thermoplastics are used in packaging materials like bags and bottles.
What is the main property of rubber that makes it useful in car tires?
Rubber’s durability and elasticity make it suitable for car tires.
How do plastics contribute to electronics?
Plastics are used in electronics for insulation and as components due to their resistance to electrical currents.
What are the common types of plastics used in everyday items?
Common types include polyethylene (used in bags) and polyvinyl chloride (used in pipes).

Presentation:

Step 1: The teacher revises the previous lesson on ceramics and glasses.
Step 2: The teacher introduces rubber and plastics, explaining their types, properties, and uses.
Step 3: The teacher shows samples and facilitates a discussion, allowing students to ask questions and share their observations.

Teacher’s Activities:

Display and discuss samples of rubber and plastic items.
Explain the different types, properties, and uses of rubber and plastics.
Facilitate class discussion and answer questions.

Learners’ Activities:

Observe and handle the samples provided.
Participate in the discussion about rubber and plastics.
Complete the evaluation and class activity discussion.

Assessment:

Monitor students’ understanding through their participation in discussions and responses to evaluation questions.

Evaluation Questions:

What are the types of rubber?
How is synthetic rubber different from natural rubber?
What are the main properties of plastics?
Give an example of a thermosetting plastic.
What are the uses of rubber in everyday life?
Why are plastics used in packaging?
How can you identify rubber?
What makes plastics suitable for construction materials?
How does elasticity benefit rubber products?
Name a use of plastics in electronics.

Conclusion:

The teacher goes around to mark students’ work, providing feedback and corrections. The key points of the lesson are reviewed to reinforce understanding.

More Useful Links :

Discover types, properties, and uses of rubber and plastics in this JSS 1 Basic Technology lesson.

Tags:Basic Technology JSS 1 First Term Lesson Notes