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25 Dec 2025
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Complete Physics Paper 1 Revision Guide
crystal
@crystal_hqqlhtzuzofp
1 / 10
Energy Stores and Transfer
Ever wondered why energy never just disappears? That's because energy is never used up - it simply moves between different energy stores like a game of pass-the-parcel that never ends.
There are eight main energy stores you need to know: thermal (heat), kinetic (movement), gravitational potential, elastic potential, chemical, magnetic, electrostatic, and nuclear. Think of these as different containers holding energy.
Energy transfer happens in four main ways: mechanically (forces doing work), electrically (current flowing), heating, and radiation (like light or sound). When you kick a football, you're mechanically transferring energy from your chemical energy stores to the ball's kinetic energy store.
Key Point: Work done and energy transferred mean exactly the same thing - they're interchangeable terms in physics!
Energy Transfer Examples
Let's look at some real-world examples that show energy transfer in action. When you throw a ball upwards, your arm muscles transfer energy from chemical stores to the ball's kinetic energy store through the work done by your throwing force.
Drop that same ball and gravity takes over. The gravitational force does work, transferring energy from the ball's gravitational potential energy store to its kinetic energy store as it accelerates downwards.
Car brakes work differently - friction between brakes and wheels does work as the car slows down. This transfers energy from the wheels' kinetic energy stores to the thermal energy store of the surroundings (that's why brakes get hot!).
Real-world Connection: Every time you see something slow down, speed up, or change direction, you're witnessing energy transfer in action.
Specific Heat Capacity
Why does it take ages to heat up a swimming pool but only minutes to warm a cup of tea? The answer lies in specific heat capacity - the amount of energy needed to raise 1kg of a substance by 1°C.
The formula you'll need to remember is ΔE = mcΔθ, where ΔE is the change in thermal energy (J), m is mass (kg), c is specific heat capacity , and Δθ is temperature change (°C).
Materials with high specific heat capacity need loads of energy to warm up and release loads when cooling down. Water has a particularly high specific heat capacity, which is why coastal areas have milder climates than inland regions.
Exam Tip: This formula will definitely appear in your exams - practice rearranging it to find different variables!
Kinetic and Potential Energy Formulas
Moving objects store energy in their kinetic energy stores, and the faster or heavier they are, the more energy they contain. The formula is Ek = ½mv² where m is mass (kg) and v is speed .
For example, a 2500kg car travelling at 20m/s has kinetic energy = ½ × 2500 × 20² = 500,000J. Notice how speed is squared - doubling speed means four times more kinetic energy!
Gravitational potential energy uses Ep = mgh (mass × gravitational field strength × height), while elastic potential energy uses Ee = ½ke² (spring constant × extension squared).
Memory Trick: Remember that kinetic energy and elastic energy both use ½ in their formulas, while gravitational potential energy doesn't.
Specific Heat Capacity Practical
This practical helps you calculate the specific heat capacity of different materials using real measurements. You'll need a metal block or beaker of water, an electrical heater, thermometer, voltmeter, and ammeter.
Start by measuring the mass, then record the initial temperature. Heat the substance for a set time whilst measuring voltage and current. Finally, record the final temperature to calculate the temperature change.
Use P = VI to find power supplied, then E = Pt to find total energy supplied. Finally, rearrange ΔE = mcΔθ to get SHC = ΔE/(mΔθ).
Practical Tip: Keep stirring water during heating to ensure even temperature distribution and more accurate results.
Series and Parallel Circuits
Series circuits are like a single-lane road where current flows through each component one after another. The total voltage splits between components, current stays the same everywhere, and you add up all the resistances.
Parallel circuits work like a multi-lane highway where current splits at junctions. Each branch gets the full battery voltage, current divides between branches, and adding more resistors actually reduces total resistance.
Use Ohm's Law to calculate voltage, current, or resistance in both circuit types. This relationship is fundamental to understanding all electrical circuits.
Quick Check: If one bulb fails in series, all go out. In parallel, the others keep working - that's why house lights use parallel circuits!
Electrical Circuits and Symbols
Electrical circuits work because cells and batteries store chemical potential energy, which transfers energy to electrons flowing through wires. Think of it like a river system where energy flows from high to low potential.
You'll need to recognise standard circuit symbols: cells (+|-), batteries (+||-), switches , lamps (⊗), resistors (rectangle), and meters (A for ammeter, V for voltmeter).
Special components include LEDs , variable resistors, LDRs , and thermistors. Each symbol represents a specific component with unique properties.
Study Tip: Draw circuits regularly to memorise symbols - they're essential for exam questions and practical work.
Energy Systems and Work Done
Energy systems help us understand how energy moves around. A system is just a collection of matter, and when it changes, energy transfers either into or out of the system.
Closed systems are special because neither matter nor energy can enter or leave - the total energy change is always zero. Energy might move between different stores within the system, but the overall amount stays constant.
Work done happens mechanically (like kicking a ball to transfer chemical energy to kinetic energy) or electrically (when current flows against resistance). Remember, work done and energy transferred mean exactly the same thing.
Conservation Key: Energy is never created or destroyed in any system - it just moves between different energy stores.
Atomic Structure and Radiation
Atoms contain protons (positive charge) and neutrons (no charge) in the nucleus, with electrons (negative charge) orbiting in shells. The number of protons defines the element, whilst different numbers of neutrons create isotopes.
Radiation comes in three types with increasing penetrating power: alpha (stopped by paper), beta (stopped by aluminium), and gamma (needs thick lead to stop it). Alpha is weakest but most ionising, gamma is strongest but least ionising.
Radioactive substances are hazardous through contamination (getting radioactive material on you) or irradiation (being exposed to radiation). Always use protective equipment and avoid direct contact.
Safety First: Understanding radiation helps you stay safe around radioactive materials and appreciate their useful applications in medicine and energy.
Circuit Components and Mains Supply
Key components include light-emitting diodes (LEDs) which only allow current in one direction, ohmic conductors that follow Ohm's law perfectly, and filament lamps whose resistance increases with temperature.
Mains electricity supplies AC current at 50Hz frequency. The three-wire system uses specific colours: brown for live wire (carries current), blue for neutral wire (completes circuit), and green/yellow for earth wire (safety protection).
Understanding these components and wiring helps you work safely with electricity and explains how everyday electrical devices function in your home.
Safety Reminder: Always remember the wire colours - incorrect wiring can be extremely dangerous and potentially fatal.
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iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
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This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
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In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
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very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Complete Physics Paper 1 Revision Guide
crystal
@crystal_hqqlhtzuzofp
Energy is everywhere around you - from the food you eat to the electricity powering your phone. Understanding how energy moves and changes form is crucial for mastering physics and explaining how the world works.
Energy Stores and Transfer
Ever wondered why energy never just disappears? That's because energy is never used up - it simply moves between different energy stores like a game of pass-the-parcel that never ends.
There are eight main energy stores you need to know: thermal (heat), kinetic (movement), gravitational potential, elastic potential, chemical, magnetic, electrostatic, and nuclear. Think of these as different containers holding energy.
Energy transfer happens in four main ways: mechanically (forces doing work), electrically (current flowing), heating, and radiation (like light or sound). When you kick a football, you're mechanically transferring energy from your chemical energy stores to the ball's kinetic energy store.
Key Point: Work done and energy transferred mean exactly the same thing - they're interchangeable terms in physics!
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Energy Transfer Examples
Let's look at some real-world examples that show energy transfer in action. When you throw a ball upwards, your arm muscles transfer energy from chemical stores to the ball's kinetic energy store through the work done by your throwing force.
Drop that same ball and gravity takes over. The gravitational force does work, transferring energy from the ball's gravitational potential energy store to its kinetic energy store as it accelerates downwards.
Car brakes work differently - friction between brakes and wheels does work as the car slows down. This transfers energy from the wheels' kinetic energy stores to the thermal energy store of the surroundings (that's why brakes get hot!).
Real-world Connection: Every time you see something slow down, speed up, or change direction, you're witnessing energy transfer in action.
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Specific Heat Capacity
Why does it take ages to heat up a swimming pool but only minutes to warm a cup of tea? The answer lies in specific heat capacity - the amount of energy needed to raise 1kg of a substance by 1°C.
The formula you'll need to remember is ΔE = mcΔθ, where ΔE is the change in thermal energy (J), m is mass (kg), c is specific heat capacity , and Δθ is temperature change (°C).
Materials with high specific heat capacity need loads of energy to warm up and release loads when cooling down. Water has a particularly high specific heat capacity, which is why coastal areas have milder climates than inland regions.
Exam Tip: This formula will definitely appear in your exams - practice rearranging it to find different variables!
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Kinetic and Potential Energy Formulas
Moving objects store energy in their kinetic energy stores, and the faster or heavier they are, the more energy they contain. The formula is Ek = ½mv² where m is mass (kg) and v is speed .
For example, a 2500kg car travelling at 20m/s has kinetic energy = ½ × 2500 × 20² = 500,000J. Notice how speed is squared - doubling speed means four times more kinetic energy!
Gravitational potential energy uses Ep = mgh (mass × gravitational field strength × height), while elastic potential energy uses Ee = ½ke² (spring constant × extension squared).
Memory Trick: Remember that kinetic energy and elastic energy both use ½ in their formulas, while gravitational potential energy doesn't.
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Specific Heat Capacity Practical
This practical helps you calculate the specific heat capacity of different materials using real measurements. You'll need a metal block or beaker of water, an electrical heater, thermometer, voltmeter, and ammeter.
Start by measuring the mass, then record the initial temperature. Heat the substance for a set time whilst measuring voltage and current. Finally, record the final temperature to calculate the temperature change.
Use P = VI to find power supplied, then E = Pt to find total energy supplied. Finally, rearrange ΔE = mcΔθ to get SHC = ΔE/(mΔθ).
Practical Tip: Keep stirring water during heating to ensure even temperature distribution and more accurate results.
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Series and Parallel Circuits
Series circuits are like a single-lane road where current flows through each component one after another. The total voltage splits between components, current stays the same everywhere, and you add up all the resistances.
Parallel circuits work like a multi-lane highway where current splits at junctions. Each branch gets the full battery voltage, current divides between branches, and adding more resistors actually reduces total resistance.
Use Ohm's Law to calculate voltage, current, or resistance in both circuit types. This relationship is fundamental to understanding all electrical circuits.
Quick Check: If one bulb fails in series, all go out. In parallel, the others keep working - that's why house lights use parallel circuits!
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Electrical Circuits and Symbols
Electrical circuits work because cells and batteries store chemical potential energy, which transfers energy to electrons flowing through wires. Think of it like a river system where energy flows from high to low potential.
You'll need to recognise standard circuit symbols: cells (+|-), batteries (+||-), switches , lamps (⊗), resistors (rectangle), and meters (A for ammeter, V for voltmeter).
Special components include LEDs , variable resistors, LDRs , and thermistors. Each symbol represents a specific component with unique properties.
Study Tip: Draw circuits regularly to memorise symbols - they're essential for exam questions and practical work.
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Energy Systems and Work Done
Energy systems help us understand how energy moves around. A system is just a collection of matter, and when it changes, energy transfers either into or out of the system.
Closed systems are special because neither matter nor energy can enter or leave - the total energy change is always zero. Energy might move between different stores within the system, but the overall amount stays constant.
Work done happens mechanically (like kicking a ball to transfer chemical energy to kinetic energy) or electrically (when current flows against resistance). Remember, work done and energy transferred mean exactly the same thing.
Conservation Key: Energy is never created or destroyed in any system - it just moves between different energy stores.
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Atomic Structure and Radiation
Atoms contain protons (positive charge) and neutrons (no charge) in the nucleus, with electrons (negative charge) orbiting in shells. The number of protons defines the element, whilst different numbers of neutrons create isotopes.
Radiation comes in three types with increasing penetrating power: alpha (stopped by paper), beta (stopped by aluminium), and gamma (needs thick lead to stop it). Alpha is weakest but most ionising, gamma is strongest but least ionising.
Radioactive substances are hazardous through contamination (getting radioactive material on you) or irradiation (being exposed to radiation). Always use protective equipment and avoid direct contact.
Safety First: Understanding radiation helps you stay safe around radioactive materials and appreciate their useful applications in medicine and energy.
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Circuit Components and Mains Supply
Key components include light-emitting diodes (LEDs) which only allow current in one direction, ohmic conductors that follow Ohm's law perfectly, and filament lamps whose resistance increases with temperature.
Mains electricity supplies AC current at 50Hz frequency. The three-wire system uses specific colours: brown for live wire (carries current), blue for neutral wire (completes circuit), and green/yellow for earth wire (safety protection).
Understanding these components and wiring helps you work safely with electricity and explains how everyday electrical devices function in your home.
Safety Reminder: Always remember the wire colours - incorrect wiring can be extremely dangerous and potentially fatal.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user