AQA GCSE Combined Science - Physics Paper 1 Review

Exam Preparation Tips

• Write answers in black pen.
• Keep answers inside the provided boxes on the exam paper for scanning purposes.
• Use SI units for calculations; be prepared to convert units (e.g., grams to kilograms).
• Use bullet points for extended response questions for clarity and time efficiency.
• For evaluate questions, discuss both sides, offer comparison, and write a conclusion.
• When writing methods, use a logical numbered list for clarity and check for understanding by imagining a less knowledgeable person following the instructions.
• Understand working scientifically skills, such as identifying variables, repeatability vs. reproducibility, and resolution.
• Know that computerized methods are often more accurate and efficient.
• In graphing, your line of best fit should curve if the data suggests it.
• Recognize systematic errors (e.g., poor calibration) and random errors (e.g., natural fluctuations).
• Math skills are crucial, comprising 20% of marks across all science papers and 30% in physics.

Physics Content

Units and Conversion

• Familiarize with base units (e.g., grams, liters) and their conversions (e.g., milli, micro).
• Equation sheets are provided but do not include units; memorization of units and rearranged equations is beneficial.

Energy

• Key Concepts: Systems, energy stores (magnetic, kinetic, thermal, etc.), energy transfer methods (heating, mechanical, electrical, radiation).
• Conservation of Energy: Energy cannot be created or destroyed, only transferred.
• Energy Calculations: Know equations for gravitational potential energy, kinetic energy, elastic potential energy.
• Specific Heat Capacity: Understand how to calculate energy change in terms of mass, specific heat capacity, and temperature change.
• Practical Skills: Conduct experiments to find specific heat capacity using metal blocks or liquids.
• Power: Measured in watts, represents the rate of energy transfer.

Efficiency

• Definition: Ratio of useful energy transfer to total energy transfer.
• Improvement Techniques: Insulation, reducing drag and friction.

National and Global Energy Resources

• Types: Renewable vs. non-renewable (finite) resources.
• Considerations: Cost, environmental impact, reliability, geographic restrictions.

Electricity

• Circuit Symbols: Know and use correctly.
• Equations: Familiarity with units and multi-step calculations.
• Current and Potential Difference: Conventional current and its implications.
• Practical Work: Investigating circuit components and IV characteristics.
• Series and Parallel Circuits: Differences in current, potential difference, and resistance.
• AC vs. DC: Differences and uses in real life.
• Domestic Electricity: Understanding the three-core cable, safety features like fuses.

The National Grid

• Efficiency through high potential difference and transformers.

Particle Model of Matter

• States of Matter: Characteristics, particle arrangement, and behavior.
• State Changes: Physical changes and conservation of mass.
• Density: Calculations and practical applications.
• Internal Energy: Understanding energy within a system, specific heat capacity, and latent heat.
• Gas Laws: Relationship between pressure, volume, and temperature.

Atomic Structure and Radiation

• Atomic Model Evolution: Historical changes in understanding.
• Radioactivity: Types of decay (alpha, beta, gamma), ionizing ability, and penetration.
• Half-life and Decay Graphs: Understanding and calculation.
• Hazards: Differentiating contamination and irradiation.

This summary provides an overview of the key topics and preparation strategies for the AQA GCSE Combined Science Physics Paper 1. Ensure to focus on understanding the concepts, practicing calculations, and familiarizing yourself with practical setups and scientific reasoning.