THE DMS ONLINE SCHOOL
Grade/Class: Grade 10 Number of Pupils in Class: 45 Date: 2026-05-11 Duration: 79 minutes
Name of Teacher: MR MASUMBA
Subject: Chemistry Topic: THE PARTICULATE NATURE OF MATTER Subtopic: Matter and the Kinetic theory Rationale: This lesson helps learners understand that matter is made of tiny particles and that the behaviour of solids, liquids and gases can be explained using the kinetic theory. In the Zambian context, this knowledge supports correct interpretation of everyday experiences such as evaporation of water, diffusion of smells, melting of candle wax and storage of substances at home, in agriculture and in industry. It also lays a strong foundation for later Chemistry topics such as changes of state, diffusion, gas behaviour and chemical reactions. This is lesson number one in the THE PARTICULATE NATURE OF MATTER study series. The lesson will use the Learner-Centered Approach through Question & Answer Method, Demonstration Method, Discussion Method and Practical Work Method, supported by brainstorming, guided questioning, group work, think-pair-share and use of charts/diagrams. Specific Outcome(s): By the end of the lesson, learners should be able to: • Describe matter • Classify the basic units of matter • Classify the states of matter Prerequisite Knowledge: • Meaning of mass as the amount of substance in an object • Meaning of space or volume as the place occupied by an object • Common examples of solids, liquids and gases from daily life • Observation of changes such as melting, boiling and evaporation • Simple distinction between visible materials and tiny particles that cannot be seen directly References: • Chemistry Pupil's Textbook Grade 10, pg. 1–8 • Integrated Science for Zambia Grade 10 Learner's Book, pg. 22–28 • Senior Secondary Chemistry Learner's Book, pg. 4–10 Knowledge: Anything that has mass and occupies space; Atoms ,molecules ,ions; Kinetic theory: in terms of particle arrangement and movement. Solid, liquid, gas Skills: Data interpretation; Diagram analysis; Scientific modeling; Heat transfer analysis Values: Systematic thinking; Precision in observations; Logical reasoning Teaching / Learning Aids: Physical Items for Teacher Demonstration: • 1 stone • 1 beaker containing water • 1 inflated balloon • 1 syringe Physical Items for Learner Activities (Groups of 5): • 9 small stones • 9 transparent cups containing water • 9 balloons • 9 syringes Drawn / Prepared Aids (Manila Paper / Cardboard): 1. Manila chart: Classification of matter into atoms, molecules and ions, arranged in three labelled columns with examples under each heading: atom—He, Ne, Cu; molecule—O2, H2O, CO2; ion—Na+, Cl-, SO4^2- 2. Manila chart: States of matter table with three labelled rows for solid, liquid and gas, and three headings: particle arrangement, particle movement, and shape/volume; includes examples stone, water, air Alternative Materials: • Lump of clay or brick piece instead of a stone • Bottle with water instead of a beaker containing water • Plastic paper bag with air instead of a balloon • Bicycle pump barrel or empty medicine syringe as a substitute for a syringe • Chalkboard drawings as alternatives to Manila chart 1 and Manila chart 2 METHODOLOGIES, STRATEGIES AND APPROACHES: Approach: Learner-Centered Approach Method: • Question & Answer Method — Introduction, Step 4 • Demonstration Method — Development Step 1 • Discussion Method — Step 2 • Practical Work Method — Step 3 Strategy: • Brainstorming — Introduction • Guided Questioning — Development Step 1, Step 4 • Use of Charts/Diagrams — Development Step 1, Step 2 • Think-Pair-Share — Step 2 • Group Work — Step 3 Lesson Implementation: [TABLE_START] Stage|Teaching Methods|Teacher's Activities|Learner's Activities|Learning Points Introduction - 10 min|Question & Answer Method|Teacher greets learners, introduces the subtopic and uses the 1 stone, 1 beaker containing water and 1 inflated balloon to ask: “What is common about these three items?” and “What do we call anything that has mass and occupies space?”|Learners observe the 1 stone, 1 beaker containing water and 1 inflated balloon and answer: “They are all forms of matter.” Learners answer: “Anything that has mass and occupies space is called matter.”|Matter is anything that has mass and occupies space. Examples used: stone, water and air in the balloon are all matter. Development Step 1 - 18 min|Demonstration Method|Teacher displays Manila chart 1 and Manila chart 2. Using Manila chart 1, the teacher points to atom—He, Ne, Cu; molecule—O2, H2O, CO2; and ion—Na+, Cl-, SO4^2- and guides learners to identify each example under its correct heading. Using Manila chart 2 together with the stone, beaker containing water, inflated balloon and syringe, the teacher demonstrates the particle arrangement, particle movement, and shape/volume for solid, liquid and gas shown on the chart with the examples stone, water and air.|Learners study Manila chart 1 and identify all examples under each class: atoms—He, Ne, Cu; molecules—O2, H2O, CO2; ions—Na+, Cl-, SO4^2-. Learners observe Manila chart 2 and the teacher’s demonstration and state for all three states: solid/stone—particles are closely packed, vibrate, and have fixed shape and fixed volume; liquid/water—particles are close and slide past each other, with no fixed shape but fixed volume; gas/air—particles are far apart and move freely, with no fixed shape and no fixed volume.|Basic units of matter: 1. Atom—smallest particle of an element, examples He, Ne, Cu. 2. Molecule—two or more atoms joined, examples O2, H2O, CO2. 3. Ion—charged particle, examples Na+, Cl-, SO4^2-. Kinetic theory: solid—particles closely packed, vibrate in fixed positions; liquid—particles close together, move/slide; gas—particles far apart, move rapidly in all directions. Step 2 - 15 min|Discussion Method|Teacher displays Manila chart 2 and asks: “Using the chart, how does particle arrangement differ in solid, liquid and gas?” “How does particle movement differ in solid, liquid and gas?” “Using the shape/volume heading on the chart, what is the shape and volume of solid, liquid and gas?” Teacher manages think-pair-share.|Learners think in pairs, then share for all three states on the chart: solid—particles are closely packed, vibrate, and have fixed shape and fixed volume; liquid—particles are close but not fixed, slide past one another, and have no fixed shape but fixed volume; gas—particles are far apart, move freely and quickly, and have no fixed shape and no fixed volume.|States of matter compared by kinetic theory: solid—fixed shape and fixed volume; liquid—no fixed shape, fixed volume; gas—no fixed shape and no fixed volume. Shape and volume depend on particle arrangement and movement. Step 3 - 24 min|Practical Work Method|Teacher places learners into 9 groups of 5 and gives each group 1 small stone, 1 transparent cup containing water, 1 balloon and 1 syringe. Teacher sets the task: “Classify each item as solid, liquid or gas. For each item, state the particle arrangement, particle movement, and whether the shape and volume are fixed or not fixed.” Teacher circulates and guides groups to use the language from Manila chart 2.|Learners in groups classify each item: small stone—solid; water in the transparent cup—liquid; air in the balloon—gas; air in the syringe—gas. For each item they state: solid/stone—particles are closely packed, vibrate, and have fixed shape and fixed volume; liquid/water—particles are close and slide past each other, with no fixed shape but fixed volume; gas/air in the balloon and gas/air in the syringe—particles are far apart and move freely, with no fixed shape and no fixed volume.|Group task: For stone, water and air, state the class of matter and explain each using the headings: particle arrangement, particle movement, shape, volume. Guide: solid = closely packed/vibrate/fixed shape/fixed volume; liquid = close/sliding/no fixed shape/fixed volume; gas = far apart/free movement/no fixed shape/no fixed volume. Step 4 - 12 min|Question & Answer Method|Teacher asks: “What is matter?” “Name the three basic units of matter shown on Manila chart 1.” “How does kinetic theory explain the difference between a solid and a gas?” Teacher invites brief group feedback, confirms correct responses, and gives homework: “Write definitions of matter, atom, molecule and ion, then compare solid, liquid and gas in a table using particle arrangement and movement.”|Learners answer: “Matter is anything that has mass and occupies space.” “The basic units are atoms, molecules and ions.” “A solid has closely packed particles that only vibrate, while a gas has particles far apart moving freely and rapidly.” Learners share group findings and record the homework task.|Summary: matter has mass and occupies space; basic units of matter are atoms, molecules and ions; kinetic theory explains states of matter by particle arrangement and movement. Worked solution to Step 3: stone—solid, closely packed particles, vibrate, fixed shape and fixed volume; water—liquid, close particles, slide past each other, no fixed shape and fixed volume; air—gas, far apart particles, move rapidly, no fixed shape and no fixed volume. Homework: Write definitions of matter, atom, molecule and ion, then compare solid, liquid and gas in a table using particle arrangement and movement. 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