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Subject: General Science
Semester: 2
Period: 6
Week: 32
School Name:
Teacher’s Name:
Subject: General science
Grade Level: Grade 6
Date: Week 32
Lesson Duration: 45 minutes
Week & Period: Week 32, Period 6
Topic: Elements, Compounds, and Mixtures
Sub-topic: Meaning, differences, metals vs non-metals, examples from daily life
Learning Objectives
By the end of the lesson, students should be able to define elements, compounds, and mixtures, distinguish among them, identify metals and non-metals on the periodic table, and give everyday examples.
Previous Knowledge
Students already know that substances can be pure or mixed.
Instructional Materials
Periodic table, charts showing elements, compounds, and mixtures, everyday samples (salt, sugar, water, metals, non-metals).
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Ask learners to name substances they use daily and guess whether they are elements, compounds, or mixtures.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
Learners’ Activities (Expanded):
- Students are given samples or pictures of iron nail, copper wire, charcoal, plastic, salt, sugar, and sand-water mixture.
- In groups, they classify each as element, compound, or mixture and explain their reasons.
- Learners handle real objects: a metal spoon vs. a piece of chalk to observe differences between metals and non-metals (shiny/dull, strong/brittle, conductor/non-conductor).
- Teacher uses charts, periodic table extracts, and demonstrations (e.g., passing current through a metal vs. rubber) to explain properties of metals and non-metals.
- Students share group findings and record them in a classification table.
Assessment Checks:
- Teacher asks learners to:
- Define an element and give two examples.
- State one difference between a compound and a mixture.
- Name two metals and two non-metals from the samples observed.
- Learners respond orally and through short written notes.
Notes (Expanded & Detailed):
- Elements: Pure substances made up of only one type of atom.
- Examples: Oxygen (O₂), Hydrogen (H₂), Iron (Fe), Copper (Cu).
- Compounds: Substances formed when two or more elements combine chemically in fixed proportions.
- Examples: Water (H₂O), Carbon dioxide (CO₂), Salt (NaCl).
- Mixtures: Combinations of substances not chemically joined and can be separated physically.
- Examples: Sand and water, salt and sugar, air (a mixture of gases).
- Metals: Good conductors of heat and electricity, shiny (lustrous), malleable (can be hammered into sheets), ductile (can be drawn into wires).
- Examples: Iron, Copper, Aluminium.
- Non-metals: Poor conductors, brittle when solid, not shiny.
- Examples: Sulfur, Carbon, Oxygen, Plastic (man-made).
- Everyday Connections:
- Cooking salt is a compound.
- Tap water is a mixture (water + dissolved minerals).
- Aluminium pots (metal) conduct heat better than wooden spoons (non-metal).
- Simple Demonstrations:
- Pass current through copper wire (bulb lights) vs. rubber band (bulb does not light).
- Drop salt in water (forms solution = compound dissolved).
- Mix sand and water (forms a mixture that can be filtered).
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: Recap definitions, differences, and examples of elements, compounds, mixtures, and metals vs non-metals.
Evaluation Method (Expanded)
Exit slip/quiz: Write one element, one compound, and one mixture. Teacher collects slips and provides oral feedback.
Assignment (Expanded): Identify five substances at home and classify them as element, compound, or mixture.
Follow-up Activity: Observe and list metals and non-metals used at home or school.
Differentiation / Inclusive Strategies: Use visuals, hands-on examples, and simplified notes for learners needing extra support.