AQA GCSE Physics Revision
GCSE Physics · Specification 8463 · England
Revising for AQA GCSE Physics? Below is every topic in the course, in specification order, with a short summary. Sign up free to get the full notes, quizzes, flashcards and exam questions for each one — filtered to the AQA course so you only revise what's on your exam.
AQA GCSE Physics topics
4.1 Energy →
Energy cannot be created or destroyed, only transferred from one store to another or dissipated. The main energy stores are chemical, kinetic, gravitational potential, elastic potential, thermal, magnetic, electrostatic, and nuclear. Energy transfers occur via mechanical work (forces), electrical work (currents), heating (temperature difference), and radiation (waves). Understanding these stores and how energy moves between them is fundamental to all physics topics, helping to explain processes from power generation to everyday actions.
4.2 Electricity →
Electrical current is the rate of flow of electrical charge. In metals, this charge is carried by electrons. We measure current in Amperes (A) using an ammeter, which must be connected in series within the circuit. The direction of conventional current is from the positive terminal to the negative terminal, even though electrons flow in the opposite direction. Charge (Q) is measured in Coulombs (C) and current (I) is related to time (t) by the equation Q = I × t. This fundamental relationship is crucial for understanding all electrical circuits.
4.3 Particle model of matter →
Matter exists in three primary states: solid, liquid, and gas. In solids, particles are closely packed in a regular arrangement, vibrating in fixed positions due to strong forces of attraction. Liquids have particles that are closely packed but randomly arranged, able to slide past each other because forces are weaker. In gases, particles are far apart, randomly arranged, and move quickly and randomly, with negligible forces between them. The state of a substance depends on its temperature and pressure, which affect the kinetic energy of its particles.
4.4 Atomic structure →
Atoms are the fundamental building blocks of all matter. Every atom consists of a tiny, dense central nucleus surrounded by electrons. The nucleus contains protons and neutrons. Protons are positively charged, neutrons have no charge, and electrons are negatively charged. The overall charge of an atom is zero because the number of protons (positive charges) equals the number of electrons (negative charges). This balance ensures the atom is electrically neutral. The electrons orbit the nucleus in specific energy levels or shells.
4.5 Forces →
Forces are pushes or pulls acting on an object. They are vector quantities, meaning they have both magnitude (size) and direction. Common forces include gravity, normal force, friction, and tension. Forces can cause an object to accelerate (change speed or direction), deform (change shape), or rotate. The overall effect of multiple forces acting on an object is determined by the resultant force, which is the single force that has the same effect as all the individual forces combined. If the resultant force is zero, the object remains at rest or continues at a constant velocity.
4.6 Waves →
Waves are disturbances that transfer energy from one place to another without transferring matter. They can be categorised into two main types: transverse and longitudinal. Transverse waves oscillate perpendicular to the direction of energy transfer, like light or water waves. Longitudinal waves oscillate parallel to the direction of energy transfer, like sound waves. All waves have properties such as amplitude, wavelength, frequency, and wave speed, which help describe their behaviour and energy carrying capacity. Understanding these fundamental types is crucial for studying wave phenomena.
4.7 Magnetism and electromagnetism →
Permanent magnets produce their own magnetic field. This field is strongest at the poles (North and South). Field lines are used to represent magnetic fields; they always go from North to South outside the magnet and never cross. We can map these fields using a compass, which aligns with the field lines, or by sprinkling iron filings, which show the pattern. The Earth itself acts like a giant magnet, which is why a compass points North.
4.8 Space physics →
Our Solar System consists of the Sun, eight planets, dwarf planets like Pluto, natural satellites (moons), and countless asteroids and comets. The Sun is a star, and the planets orbit it in elliptical paths. Beyond our Solar System, billions of stars are grouped into galaxies. Our galaxy is the Milky Way. The universe contains billions of galaxies, separated by vast distances, constantly expanding since the Big Bang.
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Topic summaries are ScienceForge originals, not official AQA material. Check the official AQA specification for the definitive content list.