p1 energy stores and transfers
4 detailed 50-minute lessons with teaching scripts, worked examples, parent guides, and assessment criteria.
Lesson Overview
Total Lessons: 4
Tier: Foundation and Higher
Duration: 50 minutes per lesson (200 minutes total)
Exam Boards: AQA, Edexcel, OCR, Eduqas, CCEA
Tier: Foundation and Higher
Duration: 50 minutes per lesson (200 minutes total)
Exam Boards: AQA, Edexcel, OCR, Eduqas, CCEA
Learning Objectives
- Explain the key ideas of p1 energy stores and transfers
- Apply p1 energy stores and transfers to exam-style questions
- Develop independent study skills
- Build cross-topic connections
Prerequisites
- Read the revision notes for p1 energy stores and transfers first (GCSE Revise summary)
- Key vocab to pre-teach: Energy store, System, Conservation of energy
- Basic skills: reading the summary notes and answering the practice questions there
Materials & Equipment
- Exercise book, coloured pens
- Scientific calculator
- Ruler
- Printed revision notes (link below)
- Internet for videos (see Resources)
Lesson 1: Introduction: p1 energy stores and transfers
Duration: 50 minutes
Starter Activity (5 minutes)
Quick Recall
Write down everything you already know about p1 energy stores and transfers. Then check against the key terms: Energy store, System, Conservation of energy. Use a mini-whiteboard or paper.
Main Content (35 minutes)
Parent/Teacher Guide:
Before lesson: Read the script below. Pre-teach key vocab: Energy store, System, Conservation of energy.
If stuck: Re-read the revision notes (link above), then break the content into smaller steps.
Extension: See the Stretch & Challenge ideas in Lesson 4.
Before lesson: Read the script below. Pre-teach key vocab: Energy store, System, Conservation of energy.
If stuck: Re-read the revision notes (link above), then break the content into smaller steps.
Extension: See the Stretch & Challenge ideas in Lesson 4.
Teaching Script (35 mins):
Mins 0-5 - Hook: "Today: p1 energy stores and transfers. By the end you will be able to answer exam questions on it unaided. It connects to the rest of Combined Science (Trilogy) because the ideas here recur across the spec."
Mins 5-20 - Direct Instruction: Work through the core ideas below one at a time; after each, ask your student to explain it back in their own words.
Mins 20-30 - Guided Practice: Model the worked example together, then let your student attempt the first practice question with guidance.
Mins 30-35 - Independent Practice: 2-3 practice questions from Lesson 3 below, with immediate feedback.
Mins 0-5 - Hook: "Today: p1 energy stores and transfers. By the end you will be able to answer exam questions on it unaided. It connects to the rest of Combined Science (Trilogy) because the ideas here recur across the spec."
Mins 5-20 - Direct Instruction: Work through the core ideas below one at a time; after each, ask your student to explain it back in their own words.
Mins 20-30 - Guided Practice: Model the worked example together, then let your student attempt the first practice question with guidance.
Mins 30-35 - Independent Practice: 2-3 practice questions from Lesson 3 below, with immediate feedback.
First Look
Start with the revision notes summary, then attempt: Foundation Name the eight energy stores and give one example of each.
Plenary (5 minutes)
Check Out
Your student states one thing they learned and one question they still have about p1 energy stores and transfers.
Lesson 2: Core Concepts: p1 energy stores and transfers
Duration: 50 minutes
Starter Activity (5 minutes)
Review Previous Lesson
Quick recap: write 3 key points from Lesson 1 on p1 energy stores and transfers. Check them against the notes below.
Main Content (35 minutes)
Energy store: A way in which energy can be stored within a system. Energy is never created or destroyed — it is only transferred between stores.
System: An object or group of objects. You define the system to describe what is happening with energy.
Conservation of energy: Energy cannot be created or destroyed, only transferred usefully, stored or dissipated (wasted).
Dissipation: Energy that is transferred to a thermal store of the surroundings that is not useful. This is often called wasted energy.
Energy is transferred between stores by four pathways: mechanically, electrically, by heating (particles), and by heating (radiation).
Conservation of energy principle: Energy can be transferred usefully, stored or dissipated, but it can never be created or destroyed. The total energy input always equals the total energy output.
| Term | Meaning | Example |
|---|---|---|
| Kinetic | Energy stored in a moving object | A car travelling along a road |
| Gravitational potential | Energy stored in an object raised above the ground | A book on a high shelf |
| Elastic potential | Energy stored in a stretched or compressed object | A stretched spring or squashed ball |
| Thermal (internal) | Energy stored in a hot object due to particle vibrations | Hot water in a kettle |
| Chemical | Energy stored in chemical bonds between atoms | Fuel, food, batteries |
| Nuclear | Energy stored in the nucleus of an atom | Uranium in a nuclear reactor |
| Magnetic | Energy stored in two separated magnets that attract or repel | Two magnets held apart |
| Electrostatic | Energy stored in two separated charges that attract or repel | Two opposite charges held apart |
Practice (10 minutes)
Q: Foundation Name the eight energy stores and give one example of each.
Answer: Kinetic — moving car; gravitational potential — book on shelf; elastic potential — stretched spring; thermal — hot cup of tea; chemical — food/fuel; nuclear — uranium in reactor; magnetic — two repelling magnets held apart; electrostatic — two opposite charges separated.
Plenary (5 minutes)
Explain Back
Your student teaches the key points back to you without looking. Fill any gaps immediately.
Lesson 3: Application: p1 energy stores and transfers
Duration: 50 minutes
Starter Activity (5 minutes)
Quick Recall
Recall the key terms: Energy store, System, Conservation of energy. Define each in one sentence.
Main Content (35 minutes)
Parent/Teacher Guide: Let your student attempt each question alone first, then compare with the model answer. Award method marks for correct working even if the final answer is wrong.
Q1: Foundation Name the eight energy stores and give one example of each.
Answer: Kinetic — moving car; gravitational potential — book on shelf; elastic potential — stretched spring; thermal — hot cup of tea; chemical — food/fuel; nuclear — uranium in reactor; magnetic — two repelling magnets held apart; electrostatic — two opposite charges separated.
Q2: Foundation A ball falls from a height of 2 m. Describe the energy transfers that take place.
Answer: At the top: gravitational potential store is at its maximum, kinetic store is zero. As the ball falls: gravitational potential store decreases, kinetic store increases. Energy is transferred mechanically (by gravitational force doing work). Some energy is dissipated to the thermal store of the surroundings due to air resistance.
Q3: Foundation State the conservation of energy principle.
Answer: Energy cannot be created or destroyed. It can only be transferred usefully, stored, or dissipated. The total energy input always equals the total energy output.
Q4: Higher An electric heater takes in 1500 J of energy. 1200 J is transferred as useful heat to the room. The rest is wasted as light and sound. Calculate the wasted energy and describe what a Sankey diagram would look like.
Answer: Wasted energy = 1500 − 1200 = 300 J. The Sankey diagram would have one input arrow (representing 1500 J), one useful output arrow (representing 1200 J, 80% of the width) going straight ahead, and one wasted output arrow (representing 300 J, 20% of the width) pointing downwards.
Q5: Higher A car of mass 1000 kg is moving at 20 m/s. The driver brakes. Explain where the energy from the kinetic store goes and why it cannot all be transferred usefully.
Answer: The kinetic store energy is transferred to the thermal store of the brakes and tyres (by friction doing work mechanically) and to the thermal store of the surroundings (by air resistance). Not all energy can be transferred usefully because friction and air resistance always cause some dissipation to the thermal store of the surroundings — this energy cannot be recovered.
Q6: Higher Describe the energy transfers when a phone is being charged, including the pathways.
Answer: Chemical store of the power station/battery → transferred electrically through the charger cable → chemical store of the phone battery (useful, storing energy). Some energy is dissipated to the thermal store of the charger and cable (due to electrical resistance) and to the thermal store of the phone battery (resistance during charging).
Plenary (5 minutes)
Error Review
Review any questions answered incorrectly. Identify whether the error was knowledge, method, or reading the question.
Lesson 4: Exam Practice: p1 energy stores and transfers
Duration: 50 minutes
Starter Activity (5 minutes)
Command Words
Review what these command words require: state (one point), describe (say what happens), explain (say why), compare (both sides), evaluate (judgement).
Main Content (35 minutes)
Extended Answer
Extended question: Extended Answer 6 marks: Describe the energy transfers that take place when a pendulum swings from its highest point to its lowest point and back again. Explain why the pendulum eventually stops. <div class="
At the highest point, the pendulum has maximum energy in its gravitational potential store and zero energy in its kinetic store (it is momentarily stationary). As it swings down, energy is transferred from the gravitational potential store to the kinetic store (mechanically, by the force of gravity doing work). At the lowest point, the kinetic store is at its maximum and the gravitational potential store is at its minimum. As the pendulum swings back up, energy is transferred from the kinetic store back to the gravitational potential store. Each swing, some energy is dissipated to the thermal store of the surroundings due to air resistance and friction at the pivot. Because energy is continuously dissipated, less energy is available in the kinetic and gravitational potential stores each swing. Eventually, all the energy has been dissipated to the thermal store of the surroundings and the pendulum stops. Mark scheme: 1 mark — identifying gravitational potential store at top; 1 mark — transfer to kinetic store as it falls; 1 mark — kinetic store maximum at bottom; 1 mark — transfer back to gravitational potential store on the upswing; 1 mark — dissipation to thermal store due to fric
Exam Tips: Always name the energy store , not just the type of energy. Say "kinetic store" not "kinetic energy". | When describing transfers, state: the store energy goes FROM → the store it goes TO → and the PATHWAY (mechanically, electrically, heating). | Sankey diagrams: the width of the arrow shows the amount of energy. Total in must always equal total out. | Exam questions often ask "where does the wasted energy go?" — it is transferred to the thermal store of the surroundings . | Never say energy is "lost" — it is dissipated or transferred to thermal stores . | In descriptions of falling objects, always mention dissipation due to air resistance for full marks.
Common Errors: Watch Out! 1. Wrong: Energy is "lost" in transfers Correct: Energy is never lost — it is dissipated (transferred to the thermal store of the surroundings where it is less useful) 2. Wrong: An object has "kinetic energy" Correct: An object has energy in its "kinetic store" — always name the store, not just the type of energy 3. Wrong: Energy is "used up" when a device works Correct: Energy is transferred from one store to another — the total amount of energy stays the same (conservation of energy)
AO3 - Reasoning & Interpretation: Analysis and Evaluation A student investigates two electric heaters. Heater A takes in 2000 J of electrical energy and transfers 1600 J to the thermal store of the room and 400 J is wasted. Heater B takes in 2000 J and transfers 1200 J to the thermal store of the room and 800 J is wasted. (a) Calculate the percentage of useful energy for each heater. (b) Draw a description of the Sankey diagram for Heater B, stating the proportions of each arrow. (c) A student claims "Heater A wastes less energy than Heater B, so Heater A is always the better choice." Evaluate this claim. Answers: (a) Heater A: (1600 ÷ 2000) × 100 = 80%. Heater B: (1200 ÷ 2000) × 100 = 60%. (b) One input arrow of width 10 un
Stretch & Challenge (Grade 8-9):
- Synoptic links: explain how p1 energy stores and transfers connects to another Combined Science (Trilogy) topic you have studied
- Real-world: research one real-world use or example of p1 energy stores and transfers
- Critical: "What are the limitations of the models used in p1 energy stores and transfers?"
Plenary (5 minutes)
Assessment Criteria
- Got it: Confident explanation + correct worked examples
- Getting there: Main points OK, needs support with detail
- Not yet: Confused on key concepts - re-run Lesson 2
Homework & Consolidation
- Consolidation: Re-answer any Lesson 3 practice questions answered incorrectly (20 mins)
- Retrieval: Write flashcards for the key terms: Energy store, System, Conservation of energy (10 mins)
- Exam practice: One past-paper question on p1 energy stores and transfers from the board websites (15 mins)
- Extension: Explain p1 energy stores and transfers to someone else in your own words (10 mins)