Chemical Industries, Classification and Local Examples for SS 1

Class: SS 1
Term: First Term
Week: 3
Age: 15 years
Duration: 60 minutes
Subject: Chemistry
Curriculum Theme: Chemical World
Focal competence: Identifying chemical industries in the local environment
Key competencies/values: Communication; ICT and Digital Competencies; Digital Competencies; Information Literacy; Environmental Literacy
Skills:

• Identifying and solving environmental problems caused by chemical industries

Previous Lesson: Applications of chemistry in the society
Topic: Chemical Industry
Subject Matter: Meaning of Chemical industry, Chemical industries in the locality, Classification of chemical industries based on

Specific Objectives

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

Cognitive Domain

• Define chemical industry.
• Identify chemical industries in their environment.
• Distinguish between different categories of chemical industries.

Affective Domain

• Appreciate the benefits of chemical industries to society and the economy.
• Show concern for the environmental impacts of chemical industries.
• Value solutions to environmental problems caused by chemical industries.

Psychomotor Domain

• Participate in identifying chemical industries within their locality (simulated or actual).
• Search for information on chemical industries using digital resources.

Social Domain

• Collaborate effectively in group discussions about the influence of chemical industries.

Reference Materials

The following resources were used in planning this lesson:

• 2025 New Revised Senior Secondary Education Curriculum (SSEC)
• Relevant State Unified Scheme of Work
• A suitable Chemistry textbook for Senior Secondary School 1
• The HeadTeacher Scheme of work For The New Revised Senior Secondary Education Curriculum (SSEC)

Instructional Materials

The teacher will teach this lesson with the aid of:

• Pictures/Diagrams/charts of various chemical industries (e.g., cement factory, refinery, soap factory).
• Smartphones or functional computers with Internet facility.
• Empty containers of common chemical products (e.g., soap, detergent, paint).
• Whiteboard and markers.

Rationale for the Lesson

Understanding chemical industries helps students appreciate how chemistry impacts daily life and the national economy. This lesson also fosters environmental literacy by highlighting the impacts of these industries and encouraging students to think about sustainable solutions. It connects theoretical chemistry to practical applications and real-world issues.

Prerequisite/Previous Knowledge

Students should have a basic understanding of chemical reactions, elements, compounds, and mixtures from their Junior Secondary School science classes.

Lesson Content/Board Summary

Chemical Industry

Meaning of Chemical Industry

A chemical industry is a sector of the economy that produces industrial chemicals. It involves the conversion of raw materials (natural resources) into a wide range of products through chemical processes. These products are essential for various other industries and for direct consumer use, contributing significantly to modern society and economic development.

Chemical Industries in the Locality (Nigerian Examples)

Nigeria has several chemical industries operating across different sectors. Examples include:

1. Cement Manufacturing: Companies like Dangote Cement, BUA Cement, and Lafarge WAPCO produce cement, a crucial building material, from raw materials like limestone and clay.
2. Petroleum Refining: Refineries (e.g., Port Harcourt Refinery, Warri Refinery, Kaduna Refinery, Dangote Refinery) process crude oil into petroleum products like petrol, diesel, kerosene, and liquefied petroleum gas (LPG).
3. Soap and Detergent Production: Companies such as Unilever, PZ Cussons, and local manufacturers produce soaps, detergents, and other cleaning agents from oils, fats, and alkalis.
4. Paint Manufacturing: Industries like Berger Paints, Dulux, and Portland Paints produce various types of paints, coatings, and varnishes.
5. Pharmaceutical Industries: Companies like Emzor Pharmaceutical Industries, May & Baker Nigeria Plc, and Fidson Healthcare Plc manufacture medicines, drugs, and other healthcare products.
6. Food Processing Industries: Breweries, soft drink manufacturers, and food seasoning companies use chemical processes to produce their goods.
7. Fertiliser Production: Industries like Indorama Eleme Fertiliser & Chemical Limited produce fertilisers to support agricultural productivity.

Classification of Chemical Industries

Chemical industries can be classified based on various criteria, including their products, the raw materials they use, their scale of operation, and the end use of their products.

Classification Based on Products

1. Basic Chemicals: These are fundamental chemicals produced in large quantities, often used as raw materials by other industries. Examples include acids (e.g., sulphuric acid, hydrochloric acid), alkalis (e.g., sodium hydroxide), salts (e.g., sodium chloride), and industrial gases (e.g., oxygen, nitrogen).
2. Specialty Chemicals: These are chemicals produced in smaller quantities for specific applications, often requiring advanced research and development. Examples include adhesives, coatings, pigments, dyes, and catalysts.
3. Consumer Chemicals: These are products directly used by the general public. Examples include soaps, detergents, cosmetics, pharmaceuticals, plastics, and paints.

Classification Based on Manufactured Raw Materials

1. Petrochemical Industries: These industries use crude oil and natural gas as their primary raw materials to produce a wide range of products like plastics, synthetic fibres, rubbers, and various organic chemicals.
2. Agro-chemical Industries: These industries derive their raw materials from agricultural products or produce chemicals for agricultural use. Examples include industries producing fertilisers, pesticides, and insecticides.
3. Mineral-based Industries: These industries use minerals as their main raw materials. Examples include cement industries (using limestone and clay), glass industries (using sand and soda ash), and salt industries (using brine or rock salt).

Classification Based on Scale of Operation

1. Large-scale Industries: These are characterised by high production volumes, complex manufacturing processes, significant capital investment, and extensive infrastructure. Examples include petroleum refineries, large cement factories, and major petrochemical complexes.
2. Medium-scale Industries: These operate at a moderate production level, with less capital and simpler processes compared to large-scale industries.
3. Small-scale Industries: These involve lower production volumes, simpler processes, and relatively small capital investment. Examples include local soap making, small-scale paint production, or artisan chemical product manufacturing.

Classification Based on End Use

1. Consumer Goods Industries: These produce goods directly consumed or used by individuals. Examples include industries manufacturing pharmaceuticals, cosmetics, detergents, and food additives.
2. Industrial Goods Industries: These produce chemicals that are used as raw materials or intermediates by other industries. Examples include industries producing sulphuric acid, caustic soda, or industrial solvents.
3. Agricultural Chemicals Industries: These focus on producing chemicals specifically for agricultural purposes, such as fertilisers, herbicides, and pesticides.

Teaching Methods/Instructional Techniques

Discussion, Explanation, Question and Answer, Group Work, Guided Practice, Internet Search, Observation (of pictures/charts)

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Activating Prior Knowledge

Teacher’s Activity: The teacher greets the students and asks them to mention some common products they use daily that they think might involve chemistry in their production (e.g., soap, plastic, medicine, cement). The teacher then introduces the topic: Chemical Industry.

Pupils’ Activity: Pupils mention various products and attempt to link them to chemistry.

Learning Point: Everyday chemical products

Step 2: Meaning of Chemical Industry

Time: 10 minutes

Teaching Skill: Explanation/Definition

Teacher’s Activity: The teacher explains the meaning of a chemical industry, highlighting its role in converting raw materials into useful products through chemical processes. The teacher uses simple examples to make the concept clear.

Pupils’ Activity: Pupils listen attentively, ask questions for clarification, and contribute to the discussion.

Learning Point: Definition of chemical industry

Step 3: Chemical Industries in the Locality

Time: 10 minutes

Teaching Skill: Guided Discussion/Identification

Teacher’s Activity: The teacher guides students to identify chemical industries in their local environment or within Nigeria. The teacher shows pictures/charts of various industries (e.g., cement factory, refinery, soap factory) and discusses their benefits and potential environmental impacts. The teacher also encourages students to proffer solutions to identified environmental problems.

Pupils’ Activity: Pupils identify local chemical industries, discuss their benefits and environmental impacts, and suggest solutions.

Learning Point: Local chemical industries

Step 4: Classification by Products

Time: 8 minutes

Teaching Skill: Classification/Explanation

Teacher’s Activity: The teacher introduces the classification of chemical industries based on their products (basic, specialty, consumer chemicals) and provides examples for each category.

Pupils’ Activity: Pupils listen, take notes, and ask questions for better understanding.

Learning Point: Classification by products

Step 5: Classification by Manufactured Raw Materials

Time: 8 minutes

Teaching Skill: Explanation/Examples

Teacher’s Activity: The teacher explains the classification based on manufactured raw materials (petrochemical, agro-chemical, mineral-based industries) with relevant examples.

Pupils’ Activity: Pupils engage in discussion and note down key points.

Learning Point: Classification by raw materials

Step 6: Classification by Scale of Operation and End Use

Time: 9 minutes

Teaching Skill: Group Work/Application

Teacher’s Activity: The teacher divides students into groups. Each group uses smartphones/computers to search the internet for chemical industries and discusses their classification based on scale of operation (large, medium, small) and end use (consumer, industrial, agricultural). They also discuss the influence of chemical industries on human lives and the national economy.

Pupils’ Activity: Pupils work in groups, conduct internet searches, discuss, and present their findings.

Learning Point: Classification by scale/end use

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

1. What is a chemical industry?
2. Mention two chemical industries found in Nigeria.
3. How can chemical industries be classified based on their products?
4. Give an example of a petrochemical industry.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Chemical industry concepts

Step 8: Note-Taking

Time: 10 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides pupils/students to copy the essential Board Summary notes on the meaning, local examples, and classification of chemical industries into their notebooks.

Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.

Learning Point: Recording lesson notes

Step 9: Conclusion

Time: 5 minutes

Teaching Skill: Consolidation

Teacher’s Activity: The teacher summarises the key points of the lesson, reiterating the importance of chemical industries and their classifications. The teacher also reminds students about the need for responsible industrial practices.

Pupils’ Activity: Pupils listen and ask any final questions.

Learning Point: Lesson consolidation

Continuous Assessment/Further Study

Type: Homework/Further Reading

Instruction: Research and write short notes on the following:

1. Choose one chemical industry in your state and describe its main products and raw materials.
2. Discuss two positive and two negative impacts of chemical industries on the environment.
3. Suggest three ways chemical industries can reduce their environmental footprint.

Lesson Keywords

• Chemical Industry – A sector producing industrial chemicals from raw materials.
• Petrochemicals – Chemicals derived from petroleum or natural gas.
• Agro-chemicals – Chemicals used in agriculture, such as fertilisers and pesticides.
• Basic Chemicals – Fundamental chemicals produced in large quantities for other industries.
• Specialty Chemicals – Chemicals produced for specific, high-value applications.
• Consumer Chemicals – Products directly used by the general public.

Differentiation

For struggling learners, the teacher can provide simplified diagrams and pre-selected websites for internet research. Group activities should be structured to ensure all members contribute. Advanced learners can be challenged to research specific chemical processes or the economic impact of a particular chemical industry in Nigeria.

Suggested Lesson Videos

For further understanding, students can search on YouTube for:

• meaning of chemical industry SS1 chemistry
• types of chemical industries Nigeria
• classification of chemical industries chemistry