Energy in Action

Overview

Students investigate how energy changes form and moves through everyday systems. Using a short circuit demonstration and flow diagrams, they classify energy as kinetic or potential, identify useful outputs and heat produced as a by-product, and explain an energy transformation using evidence.

Learning intentions

Students will:

• classify common energy types as kinetic or potential
• distinguish energy transfers from energy transformations
• represent an everyday system using an energy-flow diagram
• develop a testable prediction about energy change in a simple circuit

Success criteria

• I can classify energy examples as kinetic or potential and explain my choice.
• I can identify the input, transfer and output in an energy system.
• I can explain that some transferred energy becomes heat.
• I can draw a clear flow diagram using labelled arrows.

Curriculum links

• Energy — classify kinetic and potential energy and investigate energy transfer and transformation in simple systems.
• Science inquiry — develop predictions and hypotheses to test relationships in scientific models.
• Science inquiry — identify patterns and use evidence to explain changes when conditions are altered.

Lesson structure (50 minutes)

1. 0–5 min · Hook and retrieval. Teacher displays a photograph of a cyclist using a bicycle light and asks, “Where does the energy begin, and where does it end?” Open with the cyclist and bicycle-light hook slide. Students independently write one possible energy pathway, then share with a partner. Teacher reinforces that energy is transferred and transformed rather than created or destroyed.

2. 5–15 min · Explicit teaching. Using the energy classification and flow-diagram slides, teacher introduces kinetic energy as energy associated with movement, including thermal energy and electrical energy in this Year 8 classification, and potential energy as stored energy, including gravitational, elastic and chemical energy. Teacher models: chemical potential energy in a battery → electrical energy in a circuit → light and sound, with some energy transferred as heat. Students complete a brief “show me” classification routine using fingers or mini-whiteboards and justify two answers.

3. 15–22 min · Guided model critique. Teacher presents two flow diagrams: one accurate and one containing errors such as arrows pointing towards the input or heat being omitted. Students use think-pair-share to identify and correct the errors. Teacher explicitly distinguishes a transformation, where the form changes, from a transfer, where energy moves between components, and records student language on the board.

4. 22–35 min · Short practical investigation. In pairs, students use a battery, wires, switch and small globe or buzzer to observe an electrical system. Distribute the energy-system investigation sheet. Students first predict what outputs will be produced, then safely assemble or inspect the circuit, switch it on briefly, and record observations. They label the input, transfers and outputs on the worksheet, including heat where appropriate. Teacher circulates, checks connections and asks: “What evidence suggests that more than one form of energy is produced?” If equipment is limited, groups rotate through a teacher demonstration. Keep the circuit activity to 13 minutes.

5. 35–44 min · Apply and explain. Teacher assigns each pair one everyday system from the slides: roller-coaster, toaster, mobile phone charging, moving person, or hydroelectric generator. Students create an energy-flow diagram on the worksheet with at least three labelled stages, arrows and a note about heat produced as a by-product. They write one testable prediction, such as: “If the resistance in the circuit increases, more heat energy will be produced.” Pairs compare diagrams with another pair and give one evidence-based improvement.

6. 44–50 min · Plenary and exit check. Return to the final review and exit-question slides. Students answer: “Explain the energy transformations in a battery-powered buzzer and identify one point where heat may be produced.” They also classify chemical, gravitational, electrical and movement energy as kinetic or potential, noting that the lesson classification treats electrical and thermal energy as kinetic forms. Teacher collects responses to identify students needing reteaching.

Resources

• the complete energy transformations slide deck
• the energy-system investigation sheet
• Batteries, insulated wires, switches and small globes or buzzers
• Mini-whiteboards or scrap paper
• Visualiser or interactive display
• Safety glasses, if required by school procedures
• Timer and equipment checklist
• Board markers and coloured pens

Assessment

• Listen for accurate explanations during classification, diagram critique and partner discussion; require students to justify answers rather than guess.
• Check investigation sheets for correct identification of input energy, transformations, transfers, outputs and by-product heat.
• Use the final written response to assess whether students can apply the model to a new system and make a reasoned prediction.

Differentiation

• Provide a visual word bank on the slides with icons for chemical, gravitational, elastic, electrical, movement, light, sound and heat energy. Read instructions aloud and give one step at a time.
• Support students who need adjustments with a partially completed flow diagram, colour-coded arrows and sentence starters: “The input is…”, “Energy is transferred to…”, and “The output is…”.
• Pair students strategically and assign roles such as equipment manager, switch operator, observer and recorder. Use predictable routines, positive narration and a quiet alternative observation station for students who become dysregulated.
• Support EAL learners through labelled visuals, gesture, partner rehearsal and permission to draft ideas using home-language resources before writing in English.
• Challenge high-potential students to compare two systems, explain why heat is unavoidable in real energy transfers, or evaluate whether a diagram shows a transfer, a transformation, or both.