States of Matter: Key Revision Points for IGCSE CCEA Science | IGCSE CCEA 科学：物质状态 考点精讲

📚 States of Matter: Key Revision Points for IGCSE CCEA Science | IGCSE CCEA 科学：物质状态 考点精讲

Understanding the states of matter is fundamental to the IGCSE CCEA Science syllabus. It explains how particles behave in solids, liquids and gases, and how energy changes drive transitions between these states. This article summarises the key concepts you need to master, with clear explanations and exam tips.

理解物质的不同状态是 IGCSE CCEA 科学课程的基础。它解释了粒子在固体、液体和气体中的行为，以及能量变化如何驱动状态之间的转变。本文总结了你需要掌握的关键概念，并提供清晰的解释和考试技巧。

1. The Particle Model of Matter | 物质粒子模型

The kinetic particle model states that all matter is made up of tiny particles (atoms, molecules or ions) that are constantly moving. The higher the temperature, the more kinetic energy the particles have, so they move faster.

动理学粒子模型指出，所有物质都由微小的粒子（原子、分子或离子）组成，这些粒子不停地运动。温度越高，粒子的动能越大，因此它们运动得越快。

The arrangement and motion of the particles dictate whether a substance is a solid, liquid or gas. In solids, particles are tightly packed in a regular pattern and only vibrate. In liquids, particles are close together but can slide past each other. In gases, particles are far apart and move rapidly in all directions.

粒子的排列和运动方式决定了物质是固体、液体还是气体。在固体中，粒子紧密排列成规则的图案，只能振动。在液体中，粒子彼此靠近，但可以相互滑动。在气体中，粒子相距很远，向各个方向快速运动。

Changes of state occur when energy is added or removed, altering the movement and arrangement of the particles without changing the chemical nature of the substance.

当能量被加入或移除时，粒子的运动和排列方式会改变，从而发生状态变化，但物质的化学性质不变。

2. Properties of Solids, Liquids and Gases | 固体、液体和气体的性质

The table below summarises the key macroscopic properties of the three states, linked to particle arrangement and motion.

下表总结了三种状态的宏观性质，并与粒子的排列和运动联系起来。