Page 2: Temperature, Heat, and State Changes

This page delves into temperature, heat, and state changes, which are fundamental concepts in the particle model of matter GCSE Physics.

Definition: Temperature is a measure of the average kinetic energy of particles within a substance.

The page explains internal energy as the sum of kinetic and potential energy of particles. It also covers state changes:

• Melting and freezing (solid ↔ liquid) • Boiling and condensing (liquid ↔ gas)

Vocabulary: Specific Latent Heat - The amount of energy required to change the state of 1kg of a substance without changing its temperature.

Highlight: Understanding specific latent heat is crucial for GCSE Physics density required practical experiments and exam questions.

Page 1: Density and States of Matter

This page introduces the concept of density and explores the properties of different states of matter in GCSE Physics.

Definition: Density is the amount of mass in a given volume, measured in kg/m³ or g/cm³.

The page outlines the properties of solids, liquids, and gases:

Solids: • High density • Fixed volume and shape • Incompressible • Particles touch each other and are held in a regular structure

Liquids: • High density • Fixed volume but can flow • Incompressible • Particles touch each other but can slide past one another

Gases: • Low density • Can flow and are compressible • Expand to fill their container • Particles are far apart and move rapidly in random motion

Highlight: Understanding the properties of different states of matter is crucial for answering GCSE Physics density questions and answers.

Example: The formula for calculating density is Density = Mass / Volume, which is essential knowledge for solving density GCSE Physics problems.