Energy

Grade 7 · General Science

Semester 1 | Period 3 | Week 13

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Subject: General Science

Semester: 1

Period: 3

Week: 13

School Name:
Teacher’s Name:
Subject: General Science
Grade Level: Grade 7
Date:
Week 13 Lesson Duration: 45 minutes
Week & Period: Week 13, Period 3
Topic: Energy
Sub-topic: Definition of Energy & Kinds of Energy (Potential & Kinetic)

Learning Objectives
By the end of the lesson, students should be able to:

  1. Define energy in scientific terms.
  2. Differentiate between potential and kinetic energy.
  3. Give examples of potential and kinetic energy relevant to daily life in Liberia.

Previous Knowledge
Students already know:
• Matter exists in different forms and states.
• Basic concepts of work and movement.

Instructional Materials
• Textbook: General science textbooks for Grade 7
• Teaching aids: Charts showing potential and kinetic energy, balls, springs, water containers for demonstrations
• Students' notebooks and writing materials

Lesson Development – ABC Model

A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Activity: The teacher will ask the class:
• What do you think makes things move or change?
• Can a stretched rubber band or a raised stone do work without moving?
The teacher will record their responses on the board.
Teacher’s Role: Guide a short brainstorming session and correct misconceptions.
Learner’s Role:
• Share their ideas about movement and energy.
• Respond verbally and participate in warm-up discussion.

B – Building Knowledge (Main Lesson Body)

Time: 25–30 minutes

Teacher’s Role (Expanded & Detailed)

  1. Define Energy Clearly
    • Write the definition on the board: “Energy is the ability to do work or cause a change.”
    • Explain in simple terms: “Without energy, we cannot move, eat, work, or even talk. Energy makes things happen.”
    • Relate to learners’ daily life: walking to school, playing football, carrying buckets of water, pounding fufu.
  2. Introduce Potential Energy (Stored Energy)
    • Explain: “Potential energy is the energy an object has because of its position or condition. It is waiting to be used.”
    • Local Examples:
      • A mango hanging on a tree.
      • A boy sitting on a branch before he jumps.
      • Water stored behind a dam in Liberia (Mount Coffee Hydropower Plant).
      • A stretched rubber band or bow.
    • Demonstration: Hold a stone above the ground. Ask: “What will happen if I drop it?” (students predict → it will fall). Explain: The stone has potential energy because of its position.
  3. Introduce Kinetic Energy (Energy of Motion)
    • Explain: “Kinetic energy is the energy of a moving object. When something moves, it has kinetic energy.”
    • Local Examples:
      • A football rolling on the field.
      • A car moving along the road from Gbarnga to Monrovia.
      • Flowing St. Paul River.
      • Children running at recess.
    • Demonstration: Drop the stone from earlier → it falls. Explain: The potential energy changed into kinetic energy.
  4. Show Transformation of Energy
    • Demonstration with a rubber band: Stretch (potential) → release (kinetic).
    • Swing: A child at the highest point has potential energy, but as the swing moves down, the energy becomes kinetic.
    • Emphasize: “Energy is never lost; it changes from one form to another.”
  5. Relate to Real-Life Liberia
    • Hydroelectric dams: Water stored behind the dam = potential; flowing water turning turbines = kinetic.
    • A coconut tree: Coconut on tree = potential; falling coconut = kinetic.
    • Rice mill: Stored grains (potential) → moving grinding wheel (kinetic).

 

Learners’ Activities (Expanded & Interactive)

  • Group Observation: Learners watch teacher demonstrations (stone drop, rubber band, rolling ball).
  • Class Discussion: Students brainstorm local examples of potential and kinetic energy (e.g., in farming, transportation, sports, home activities).
  • Pair Work: In pairs, learners act out one example of potential energy and then show how it changes to kinetic (e.g., one pretends to climb, then jump).
  • Mini Experiment: Teacher provides objects (stones, bottle caps, small water container). Students experiment with lifting (potential) and dropping (kinetic).
  • Diagram Labeling: Learners draw or label pictures of potential vs kinetic energy in their notebooks.

 

Assessment Checks (More Extensive)

  1. Oral Questions:
    • What is energy?
    • Give two examples of potential energy in your environment.
    • Give two examples of kinetic energy in your environment.
    • What happens to potential energy when an object moves?
  2. Classroom Activity:
    • Teacher points to objects in the classroom (chalk on the board, chair, book in hand, student walking). Students say whether it has potential or kinetic energy.
  3. Quick Quiz:
    • Which has potential energy: (a) mango on a tree (b) a ball rolling (c) flowing river?
    • Which has kinetic energy: (a) parked car (b) running boy (c) stone on a shelf?

 

Notes (Expanded & Detailed)

  • Energy makes things happen — it is required for all activities of life.
  • Two main forms of mechanical energy:
    • Potential = stored (position/condition).
    • Kinetic = moving.
  • Energy is always transformed from one form to another (e.g., stored water → moving water → electricity).
  • Importance in Liberia:
    • Hydroelectric power (Mount Coffee Dam).
    • Farming (cutlass raised = potential, cutting motion = kinetic).
    • Sports (football, running, basketball).

C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary:
• The teacher will ask the students to recall:

  • Definition of energy
  • Differences between potential and kinetic energy
  • Examples of each from daily life
    Evaluation Method (Expanded):
    • Exit slip/quiz: Students will write short answers to:
  1. Define energy.
  2. Give one example each of potential and kinetic energy.
  3. Explain how potential energy can become kinetic energy.
    Teacher will collect and quickly review for understanding
    • Provide oral feedback before class ends

Assignment (Expanded): Follow-up Activity:
• Observe five objects at home or school, classify them as having potential or kinetic energy, and explain why.
• Draw and label a simple diagram showing potential energy converting to kinetic energy.

Differentiation / Inclusive Strategies
• Struggling Learners: Provide simple, relatable examples and step-by-step demonstrations.
• Advanced Learners: Encourage research on different forms of energy and their applications in Liberia.
• Students with Disabilities: Use tactile items, peer assistance, and visual aids for demonstration.

Teacher’s Reflection (After Class)
• What worked well? ______________________________________________________
• What needs improvement? _________________________________________________
• Students’ engagement level: □ High □ Medium □ Low