Energy stores and transfers

Activities to try

1. 1

   Energy tracker: predict and trace the start and end stores of one process

   Why it works: Energy can be tracked as a quantity that moves between a small set of stores along named pathways; focusing on just the start and end stores of a single process makes conservation and relocation visible without renaming energy at every intermediate step.

   1. Pick a familiar process one at a time: a falling ball, a torch switched on, a kettle heating, a bow firing an arrow, a car braking.
   2. Before running it, PREDICT which store empties and which fills, and name the pathway (or pathways) between them (e.g. mechanical working; electrical working; heating by radiation).
   3. Represent the start and end as energy bar charts: one bar per store, with fill level showing how much energy is in each at the START snapshot and at the END snapshot.
   4. Check your prediction against the recomputed end snapshot and name where the energy ends up (often the thermal store of the surroundings).
   5. Worked single-process examples to study: falling ball (gravitational store → kinetic store, by mechanical working); electric kettle (energy transferred by electrical working from the mains supply into the thermal store of the water and kettle — one unchained process; the store that empties is outside the kettle, e.g. at the power station, so the bar chart shows energy coming in rather than a kettle store emptying); torch (chemical store of the battery → [electrical working, then heating by radiation] → thermal store of the surroundings).
2. 2

   Sort it: STORE or PATHWAY?

   Why it works: Stores (quantifiable snapshots) and pathways (processes over time) are different categories; 'electrical', 'light' and 'sound' name transfers, not storage — the central KS3 error the model fixes.

   1. Sort cards into two bins — STORES (kinetic, gravitational, elastic, thermal, chemical, nuclear, magnetic/electrostatic) and PATHWAYS (mechanical working, electrical working, heating by particles, heating by radiation).
   2. Place the tricky cards: electric current, light and sound — these go in the PATHWAY bin, because they describe how energy is carried, not where it sits.
   3. For each of the four named pathway cards, explain that its 'working/heating' naming marks it as a process happening over time (electric current, light and sound lack this ending but still describe transfers: electrical working, radiation and mechanical working by vibrations); for each store card, explain it is something you could quantify at an instant.
   4. Catch and correct the distractor claim: 'The torch stores electrical energy and light energy, which are two of the energy stores.' State why that is wrong.
3. 3

   Store-and-pathway reference anchor

   Why it works: Seeing the two categories side by side, with examples, pre-empts the store/pathway confusion and gives a glossary learners can return to while tracing.

   1. Study a labelled reference: each store with one real-world example (e.g. raised object = gravitational; stretched bow = elastic; hot water = thermal; battery = chemical) and the note that each store is something you could quantify.
   2. Study the four pathways listed as arrows/processes, each marked as 'a process, over time'.
   3. Examine a fixed worked example laid out side by side: torch — chemical store → [electrical working + heating by radiation] → thermal store of the surroundings.
   4. Use the two-category layout (stores on one side, pathways on the other) to self-check before and during the tracing task.