Forms of Energy

Overview

In this lesson (3 of 36) students build understanding of energy as it appears in different physical systems. They identify and categorise energy forms (kinetic, gravitational, elastic, thermal, chemical, and electrical) and link each form to observable evidence.

Learning intentions

• Students will describe a physical system and how its energy changes using evidence.
• Students will identify examples of six forms of energy in everyday situations and science contexts.
• Students will categorise energy transfers by matching the energy form to system behaviour (e.g., motion, height, stretching, temperature change, reactions, and current).
• Students will use energy concepts language accurately to explain what form of energy is present.

Success criteria

• I can correctly match situations to the correct energy form (kinetic, gravitational, elastic, thermal, chemical, electrical).
• I can justify my categorisation using one piece of evidence from the situation (e.g., speed, height, temperature, stretching, reaction, lighting).
• I can describe a physical system and describe the change that happens to it using energy ideas.

Curriculum links

• AS92047 — Demonstrate understanding of a physical system using energy concepts: describing a physical system, describing change using evidence, and describing relevant energy concepts using evidence.
• AS91923 — Demonstrate understanding of science-related claims in communicated information: describing science claims and the science language/conventions used to support them.
• Science learning focus: energy transfer and conservation of energy ideas used to understand change in physical systems.

Lesson structure (50 minutes)

1. 0–5 min · Hook (quick demo). Teacher displays three fast-changing evidence cards (moving toy car, hot water/steam photo, and a battery powering a small LED) and asks students what “energy” they notice. Students make a rapid list of what they think is happening in each system.

2. 5–12 min · Direct teach (energy forms anchor). Teacher introduces a simple “energy form → evidence” set:

• kinetic: motion/speed
• gravitational: height/position in a gravitational field
• elastic: stretching/compression (springy deformation)
• thermal: temperature change
• chemical: stored in fuels/food/batteries; reaction changes it
• electrical: charge/current; powering devices Teacher emphasises that a physical system is a defined space with interacting objects, and energy concepts connect to the system’s behaviour. Students copy the “evidence” column into their book and add one example for each form.

3. 12–25 min · Categorising stations (evidence sorting). Teacher sets up 6 stations around the room (or 6 table sets): each station has 2–3 short scenario strips plus a few “incorrect” distractor strips. Students rotate in pairs, sorting each scenario strip into one energy form category and writing one sentence justification: “The evidence is…, so the energy form is…”.

4. 25–32 min · Whole-class moderation (class discussion). Teacher projects one scenario strip at a time (e.g., “ball thrown up then falling”, “bouncing on a trampoline”, “melting ice in a cup”, “burning toast”, “LED in circuit”, “stretched rubber band releases”). Students vote, then justify with evidence; teacher corrects misconceptions (for example: distinguishing elastic energy from thermal energy). Students update their categorisation notes with teacher-approved wording.

5. 32–42 min · Physical system mini-brief (write and check). Teacher gives a one-page template with one system pictured: “Insulated cup of water on a desk with a thermometer” OR “Rising-and-falling skateboard ramp setup” OR “Slinky spring being compressed then released”. Students complete:

• Describe the physical system (what’s included).
• Describe the change in behaviour/property.
• State which energy forms are present at the start and during the change, with evidence. Teacher circulates and gives rapid feedback on evidence and energy language.

6. 42–48 min · Formative check (two-question exit mini-quiz). Teacher hands out a short response sheet with two questions:

• Q1: Match one scenario to the correct energy form.
• Q2: Give one piece of evidence and one correct energy-form term. Students answer independently.

7. 48–50 min · Wrap (collect + preview next lesson). Teacher briefly shares what was done well and what needs improving (e.g., evidence vs guesswork). Students clean up and place sheets in the collection tray.

Resources

• Energy form cards: kinetic, gravitational, elastic, thermal, chemical, electrical
• Scenario strips (at least 12–18 total, including distractors)
• Station labels and response templates
• Projector or printed scenario images
• Timer for rotations
• Student notebooks and pens
• One physical-system mini-brief worksheet per student (3 possible contexts—teacher chooses which to distribute)
• Exit mini-quiz sheet

Assessment

• Formative: teacher observes station sorting and checks justifications include evidence and the correct energy-form term.
• Formative: whole-class moderation checks misconceptions through evidence-based student explanations.
• Summative-for-this-lesson evidence: exit mini-quiz responses (matching accuracy and evidence-based justification) aligned with describing energy concepts and change in a physical system.

Differentiation

• Support: sentence starters for justifications (“The evidence is…”, “This shows… energy because…”), plus a word bank of energy terms.
• Support: provide a worked example of one scenario strip modelled before stations.
• Challenge/extension within the task: ask some students to label two energy forms that may be present during change (e.g., gravitational to kinetic; chemical to thermal) even if the “main” categorisation is single-form.
• EAL/SEN: allow oral justification recorded by the student in brief notes; accept alternative phrasing as long as evidence is clear and the energy term is correct.