Chemistry, Introductory Concepts and the Scientific Method for SS 1

Class: SS 1
Term: First Term
Week: 1
Age: 15 years
Duration: 60 minutes
Subject: Chemistry
Curriculum Theme: The chemical world
Focal competence: Applying knowledge of chemistry in everyday life
Key competencies/values: ICT and Digital Competencies; Digital Competencies
Skills:

• Applying the scientific method of observation, hypothesizing experimenting and drawing conclusion in everyday life

Previous Lesson: Particular Nature Of Matter: Atomic Number, Isotopy and Relative Masses
Topic: Introductory Concepts
Subject Matter: Meaning of Introductory concepts, Definition of chemistry, The scientific method

Specific Objectives

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

Cognitive Domain

• Define chemistry.
• Define introductory concepts.
• Describe the scientific method.
• Identify the stages of the scientific method.

Affective Domain

• Appreciate the relevance of chemistry in everyday life.
• Develop a scientific attitude towards problem-solving.

Psychomotor Domain

• Deduce the stages of the scientific method through simple activities.
• Participate in simple scientific investigations.

Social Domain

• Collaborate effectively in group activities during experiments.

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
• Essential Chemistry for Senior Secondary Schools by O. S. Adeoye
• 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:

• Dictionary
• Mobile phones
• Functional computer with Internet facility
• Common objects (e.g., bottles, bottle caps, balloons, feathers, iron nails, etc.)
• Plastic bowls
• Chart showing the stages of the scientific method
• Video clips on applications of chemistry

Rationale for the Lesson

This lesson provides a foundational understanding of chemistry, setting the stage for future learning in the subject. It introduces students to the systematic approach of the scientific method, which is crucial for critical thinking and problem-solving in science and everyday life. Understanding these concepts helps students connect chemistry to their daily experiences and appreciate its importance.

Prerequisite/Previous Knowledge

Students should have a basic understanding of matter and its states from their Junior Secondary Science classes.

Lesson Content/Board Summary

Introductory Concepts and the Scientific Method

Introductory Concepts

Introductory concepts in Chemistry refer to the fundamental ideas, definitions, and principles that form the basis of the subject. These concepts are essential for understanding more complex topics in chemistry and provide a framework for scientific inquiry.

For SS 1 Chemistry, introductory concepts include:

1. The definition of Chemistry.
2. The scientific method.
3. The relationship of chemistry to other sciences.
4. The importance and applications of chemistry in everyday life.

Definition of Chemistry

Chemistry is the branch of science that studies the composition, properties, and changes of matter. It investigates what matter is made of, how it behaves, and how it can be transformed from one form to another.

Key aspects of chemistry include:

1. Composition: What substances are made of (e.g., elements, compounds, mixtures).
2. Properties: The characteristics of substances (e.g., colour, density, melting point, reactivity).
3. Changes: How substances interact and transform (e.g., burning, rusting, dissolving, cooking).

Chemistry is often called the “central science” because it connects to many other scientific disciplines like biology, physics, geology, and environmental science.

The Scientific Method

The scientific method is a systematic approach used by scientists to investigate natural phenomena, acquire new knowledge, or correct and integrate previous knowledge. It is a logical and organised way to solve problems and answer questions through observation and experimentation.

Stages of the Scientific Method

The scientific method typically involves the following stages:

1. Observation: Noticing and describing events or processes in a careful, objective way. This involves using the five senses or scientific instruments to gather information.
2. Question/Problem Identification: Formulating a question or identifying a problem based on the observations. This question should be specific and testable.
3. Hypothesis: Proposing a testable explanation or educated guess for the observation or problem. A hypothesis is a statement that can be proven true or false through experimentation.
4. Experimentation: Designing and conducting a controlled procedure to test the hypothesis. This involves manipulating variables and collecting data.
5. Data Analysis: Organising, interpreting, and analysing the data collected from the experiment. This often involves using charts, graphs, or statistical methods.
6. Conclusion: Drawing a conclusion based on the analysis of the data. The conclusion states whether the hypothesis is supported or refuted by the experimental evidence.
7. Communication: Sharing the results and conclusions with others through reports, presentations, or publications, allowing for peer review and further investigation.

The scientific method is an iterative process, meaning that conclusions from one experiment can lead to new observations, questions, and further experiments.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Observation, Roleplay, Video Presentation

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Questioning/Activating Prior Knowledge

Teacher’s Activity: The teacher greets the students and asks them what they understand by “science” and “matter.” The teacher then introduces Chemistry as a branch of science that studies matter.

Pupils’ Activity: Pupils respond to the teacher’s questions and listen attentively to the introduction.

Learning Point: Science and matter recall

Step 2: Definition of Chemistry

Time: 10 minutes

Teaching Skill: Explanation/Definition

Teacher’s Activity: The teacher defines Chemistry, explaining its focus on the composition, properties, and changes of matter. The teacher provides examples of how chemistry relates to everyday life (e.g., cooking, cleaning, rusting).

Pupils’ Activity: Pupils listen, ask questions for clarification, and note down the definition of chemistry.

Learning Point: Chemistry definition

Step 3: Introduction to the Scientific Method

Time: 10 minutes

Teaching Skill: Explanation/Illustration

Teacher’s Activity: The teacher introduces the scientific method as a systematic way to solve problems in science. The teacher explains the importance of following logical steps to arrive at valid conclusions. The teacher then introduces the first few stages: Observation, Question, and Hypothesis.

Pupils’ Activity: Pupils listen and contribute ideas on how problems are solved in everyday situations.

Learning Point: Scientific method introduction

Step 4: Practical Activity – Deducing Scientific Method Stages (Part 1)

Time: 10 minutes

Teaching Skill: Demonstration/Guided Inquiry

Teacher’s Activity: The teacher guides students through a simple “Sinking and Floating” experiment using common objects (e.g., bottle cap, feather, iron nail, plastic bottle). The teacher prompts students to observe, ask questions (e.g., “Why do some objects float and others sink?”), and form a hypothesis (e.g., “Heavier objects sink, lighter objects float”).

Pupils’ Activity: Pupils observe the objects, participate in asking questions, and propose hypotheses based on their observations.

Learning Point: Observation and hypothesis

Step 5: Practical Activity – Deducing Scientific Method Stages (Part 2)

Time: 10 minutes

Teaching Skill: Guided Experimentation/Discussion

Teacher’s Activity: The teacher guides students to test their hypotheses from the previous step by placing the objects in water and observing the results. The teacher then leads a discussion on data analysis and drawing conclusions, comparing the results with their initial hypotheses. The teacher introduces the remaining stages: Experimentation, Data Analysis, Conclusion, and Communication.

Pupils’ Activity: Pupils conduct the experiment, record their observations, analyse the data, and draw conclusions about sinking and floating.

Learning Point: Experimentation and conclusion

Step 6: Applications of Chemistry

Time: 5 minutes

Teaching Skill: Video Presentation/Discussion

Teacher’s Activity: The teacher guides students to watch a short video on the applications of chemistry in everyday life (e.g., medicine, agriculture, industry). The teacher facilitates a brief discussion on how chemistry impacts their daily lives.

Pupils’ Activity: Pupils watch the video and contribute to the discussion by identifying applications of chemistry they observe around them.

Learning Point: Chemistry in daily life

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 chemistry?
2. Mention two stages of the scientific method.
3. Give one example of how chemistry is applied in everyday life.
4. Describe what a hypothesis is.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Lesson understanding assessment

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 definition of chemistry and the stages of the scientific method into their notebooks.

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

Learning Point: Board notes copying

Step 9: Conclusion

Time: 5 minutes

Teaching Skill: Summarisation

Teacher’s Activity: The teacher briefly summarises the lesson, reiterating the definition of chemistry and the importance of the scientific method in understanding the world around us. The teacher encourages students to observe their environment scientifically.

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

Learning Point: Lesson main points reinforced

Continuous Assessment/Further Study

Type: Homework

Instruction: Answer the following questions in your notebook.

1. In your own words, explain what “introductory concepts” mean in the study of a new subject like Chemistry.
2. List and briefly explain any three stages of the scientific method.
3. Identify two ways chemistry contributes to advancements in medicine or agriculture.
4. Think of a simple everyday problem (e.g., why does bread get mouldy?). Formulate a question and a hypothesis for this problem, following the scientific method.

Lesson Keywords

• Chemistry – The study of matter’s composition, properties, and changes.
• Matter – Anything that has mass and occupies space.
• Scientific Method – A systematic approach to scientific investigation.
• Observation – The act of noticing and describing events.
• Hypothesis – A testable explanation or educated guess.
• Experimentation – A procedure carried out to test a hypothesis.
• Conclusion – A judgment or decision reached after data analysis.

Differentiation

Support: Provide simplified definitions and visual aids for students who struggle with abstract concepts. Pair weaker students with stronger ones for the practical activities and note-taking. Offer sentence starters for defining terms or describing stages.

Extension: Challenge advanced students to research a historical scientific discovery and identify how the scientific method was applied. Encourage them to design a simple experiment to test another everyday phenomenon and present their findings.

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