Overview & Synopsis

Physics is governed by fundamental conservation laws, primarily the conservation of energy, mass, and momentum, which dictate the behavior of all physical systems from subatomic to galactic scales. These key ideas establish the relationship between matter and energy, utilizing the particle model to explain macroscopic properties through microscopic interactions and kinetic theory. Understanding these principles allows for the quantification of physical phenomena through rigorous mathematical modeling and the prediction of system outcomes under varying conditions using vector and scalar analysis.

Examiner Tips for Key ideas

• These concepts are embedded throughout the specification and will be assessed across all papers.
• Use these key ideas to structure explanations in extended response questions.
• Ensure you can identify how these overarching themes apply to specific topics like electricity or forces.

Key Marking Points

• Use of models (e.g., particle model, wave models)
• Cause and effect relationships (e.g., force and acceleration, nuclear changes and radiation)
• Action at a distance and field concepts (electrical, magnetic, gravitational)
• Differences (pressure, temperature, potential) as drivers of change
• Proportionality (e.g., weight/mass, force/extension)
• Expression of physical laws and models in mathematical form