Matter and its Properties

Grade 10 · Chemistry

Semester 1 | Period 1 | Week 5

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Subject: Chemistry

Semester: 1

Period: 1

Week: 5

School Name:
Teacher’s Name:
Subject: Chemistry
Grade Level: Grade 10
Week & Period: Week 5, Period I
Date:
Topic: Matter and Its Properties
Sub-topics:

  1. States of Matter and Their Changes
  2. Properties and Changes of Matter
  3. Standard Separation Techniques for Mixtures
  4. Classification of Mixtures

 

Learning Objectives

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

  • Identify the three main states of matter and describe their particle arrangement
  • Explain the physical changes between states of matter (melting, freezing, evaporation, condensation, sublimation)
  • Distinguish between physical and chemical properties and changes
  • Describe and apply separation techniques such as filtration, evaporation, decantation, distillation, and chromatography
  • Classify mixtures as homogeneous or heterogeneous
  • Understand the relevance of melting and boiling points in separation

 

Previous Knowledge

Learners have basic knowledge of matter and elements from Junior Secondary School. They are also familiar with everyday examples of solids, liquids, and gases.

 

Instructional Materials

  • Water, sugar, salt, sand, beaker, filter paper, evaporating dish
  • Diagrams of matter states and separation techniques
  • Flashcards with mixtures and their components
  • Heat source for demonstration
  • Videos/animations showing molecular behavior in matter

 

Anticipation (Warm-Up) – 5 minutes

Ask:

  • “Why does ice melt when we hold it?”
  • “How do we get clean water from dirty water?”
  • “What happens when you heat soup too long?”

Transition to: All these processes are based on the properties of matter and how mixtures can be separated.

 

Building Knowledge (Main Lesson) – 25 minutes

  1. States of Matter and Their Changes:
  • Three main states: solid (fixed shape/volume), liquid (fixed volume), gas (no fixed shape/volume)
  • Changes: melting, freezing, condensation, evaporation, sublimation
  • Use particle diagrams to illustrate
  1. Properties and Changes of Matter:
  • Physical properties: color, boiling point, melting point, density
  • Chemical properties: ability to burn, rust, react with acids
  • Physical changes: no new substance formed (melting, boiling)
  • Chemical changes: new substance formed (burning, rusting)
  1. Separation Techniques:
  • Solid-solid: sieving, magnetic separation
  • Solid-liquid: filtration, evaporation
  • Liquid-liquid: decantation, separating funnel
  • Explain how boiling/melting points help in distillation and evaporation
  1. Classification of Mixtures:
  • Homogeneous mixtures: uniform composition (e.g., salt in water)
  • Heterogeneous mixtures: visible different parts (e.g., sand in water)

 

Learners’ Activities

  • Classify 5 given substances as solid, liquid, or gas
  • Observe melting of ice and condensation of steam
  • Group work: match separation methods to sample mixtures
  • Fill a chart identifying whether mixtures are homogeneous or heterogeneous

 

 Consolidation (Review and Assessment) – 10 minutes

Oral Questions:

  • “What makes a mixture homogeneous?”
  • “Name one separation method for solid-liquid mixtures.”
  • “What kind of change is boiling? Physical or chemical?”
  • “Why do gases have no fixed shape or volume?”

Homework/Assignment:

  • Draw diagrams showing: melting, freezing, evaporation, condensation
  • Research and write a paragraph on how water is purified for drinking
  • List 3 common mixtures at home and how they can be separated

 

Short Notes (For Learners)

Matter exists in three states: solid, liquid, and gas. Solids have fixed shape and volume; liquids have fixed volume; gases have neither. Matter can change from one state to another by heating or cooling.

Physical changes don’t make a new substance, while chemical changes do. Mixtures are combinations of substances. Homogeneous mixtures look uniform, heterogeneous ones don’t.

Mixtures can be separated using methods like filtration, evaporation, distillation, and decantation. These depend on properties like particle size and boiling points.

 

Expanded Notes/Instructions

Demonstrate at least one separation method (filtration or evaporation).
Assign groups to draw particle arrangements in solids, liquids, and gases.
Use videos to show how particles behave during state changes.
Have a chart where learners place real-life items into solid, liquid, or gas categories.

 

Inclusive/Differentiation

  • Diagrams and charts for visual learners
  • Hands-on demonstrations for kinesthetic learners
  • Peer tutoring for learners who struggle with classifying or drawing
  • Group discussions for auditory learners

 

Teacher’s Reflection (Post-lesson Questions)

  • Did learners clearly understand the difference between physical and chemical changes?
  • Were they able to classify mixtures correctly as homogeneous or heterogeneous?
  • Were any separation techniques confusing to them?
  • Did my demonstrations help or distract from the topic?
  • Did all groups contribute equally to the group activities?
  • How can I assess their grasp of state changes beyond simple recall?