Physics Paper 1 - Core Topics

Ever wondered why your phone gets warm when charging or how nuclear power stations work? Physics Paper 1 tackles the big ideas behind everyday phenomena through four essential topics that you'll definitely see on your exams.

Energy forms the backbone of everything - it can never be created or destroyed, only transferred between different forms like kinetic, thermal, and chemical energy. You'll need to distinguish between renewable sources (like wind and hydro) that can be replenished and non-renewable ones (fossil fuels and nuclear) that can't.

Electricity flows through circuits in predictable ways. In series circuits, current stays the same throughout but voltage divides up, whilst parallel circuits split current but maintain the same voltage across each branch. Components like thermistors and LDRs change their resistance based on temperature and light conditions.

The particle model explains why ice melts and steam condenses by showing how particles behave differently in solids, liquids, and gases. Internal energy changes when you heat something, either raising temperature or causing state changes without temperature shifts.

Atomic structure reveals why some materials are radioactive and how half-life determines danger levels. Alpha particles can't penetrate paper but cause serious damage inside your body, whilst gamma rays travel far but cause less concentrated harm.

Exam Tip: Connect these topics together - energy transfers happen in circuits, particle movement involves kinetic energy, and radioactive decay releases energy too.