AQA GCSE Physics Paper 1 (Higher Tier) – 3-Hour Intensive Crash Course
Course Philosophy:
This is a rapid revision and application tool. It assumes prior knowledge and focuses on strengthening core concepts, making connections, and applying knowledge to exam-style questions. The focus is on calculation skills and key explanations.
Structure:
- Hour 1: Energy
- Hour 2: Electricity
- Hour 3: Particle Model & Atomic Structure
Hour 1: Energy
Subtopic 1.1: Energy Changes & Calculations
Detailed Content:
- Energy Stores & Transfers: Kinetic, Thermal, Chemical, Gravitational Potential, Elastic Potential, Nuclear, Magnetic, Electrostatic.
- Conservation of Energy: Energy cannot be created or destroyed, only transferred.
- Key Equations:
- Kinetic Energy (KE): (mass in kg, velocity in m/s)
- Gravitational Potential Energy (GPE): (mass in kg, g = 9.8 N/kg, height in m)
- Elastic Potential Energy: (k = spring constant, e = extension)
- Work Done: (Force in N, distance in m). Work done is equal to energy transferred.
- Power: (Energy in J, time in s). Power is the rate of energy transfer.
Subtopic 1.2: Efficiency & Resources
Detailed Content:
- Efficiency: A measure of how much useful energy output you get from a total energy input.
- (as a decimal or percentage)
- Efficiency can also be calculated using power:
- Wasted Energy: Energy is always dissipated (spread out) into the thermal energy store of the surroundings.
- Improving Efficiency: Reduce friction (lubrication), reduce thermal energy loss (insulation), streamline shapes.
- Energy Resources:
- Renewable: Solar, Wind, Hydro-electric, Geothermal, Tidal, Bio-fuels.
Non-Renewable: Fossil Fuels (Coal, Oil, Gas), Nuclear Fuel.
Hour 2: Electricity
Subtopic 2.1: Circuits & Current-P.D. Relationships
Detailed Content:
- Standard Circuit Symbols: You MUST know these (cell, battery, resistor, variable resistor, LED, LDR, thermistor, fuse, diode).
- Charge, Current & Time: (Charge (Q) in Coulombs (C), Current (I) in Amps (A), time (t) in seconds (s)).
- Ohm’s Law & I-V Characteristics:
- (Potential Difference (V) in Volts (V), Resistance (R) in Ohms (Ω)).
- Resistor: I is directly proportional to V. Straight line through the origin.
- Filament Lamp: Resistance increases with temperature. Curve that flattens.
- Diode: Current only flows in one direction. Very high resistance in reverse.
- LDR & Thermistor:
- LDR (Light-Dependent Resistor): Resistance decreases as light intensity increases.
- Thermistor: Resistance decreases as temperature increases.
Subtopic 2.2: Series & Parallel Circuits, Power
Detailed Content:
- Series Circuits:
- Current is the same throughout.
- P.D. is shared between components.
- Parallel Circuits:
- P.D. is the same across each branch.
- Current is shared between branches. The total current is the sum of the branch currents.
- Electrical Power & Energy:
- (Very important for explaining heating effects)
- or (Energy transferred in Joules)
Hour 3: Particle Model & Atomic Structure
Subtopic 3.1: Particle Model & Density
Detailed Content:
- Density: (Density in kg/m³, mass in kg, volume in m³).
- States of Matter:
- Solid: Strong forces, fixed shape/volume, particles vibrate.
- Liquid: Weaker forces, fixed volume, takes shape of container, particles can move.
- Gas: Very weak forces, fills container, particles move randomly.
- Internal Energy: The total kinetic and potential energy of all particles. Increasing temperature increases kinetic energy.
- Specific Heat Capacity (c): Energy needed to raise 1 kg of a substance by 1°C.