Chemistry Vocabulary Quick-Memorisation Guide | 化学词汇术语速记指南

📚 Chemistry Vocabulary Quick-Memorisation Guide | 化学词汇术语速记指南

Mastering key chemistry terms is essential for success in Year 9 CIE Chemistry. This guide not only defines the most important vocabulary but also offers creative memory aids, analogies and mnemonics to make recall faster and more effective.

掌握核心化学术语对Year 9 CIE化学学习至关重要。本指南不仅定义最重要的词汇，还提供富有创意的记忆方法、类比和助记符，使记忆更快速、更有效。

1. States of Matter and Energy | 物质状态与能量

The three common states of matter are solid, liquid and gas. In solids, particles are tightly packed in a regular arrangement and only vibrate in place. In liquids, particles are close together but can move past each other. In gases, particles are far apart and move rapidly in all directions.

物质常见的三种状态是固态、液态和气态。固态时粒子紧密排列成规则结构，只能在固定位置振动。液态时粒子接近但能彼此滑动。气态时粒子相距很远，并向各个方向快速运动。

Memory aid: Think of a crowded dance floor – in a solid, everyone stands still; in a liquid, people move a little; in a gas, everyone runs wildly. Mnemonic: ‘S-L-G, Stand-Little-Go!’

记忆方法：想象一个拥挤的舞池——固态时每个人站着不动；液态时人们稍微移动；气态时所有人疯狂奔跑。助记符：’S-L-G，站-小动-跑！’

The energy changes involved in state changes: melting, freezing, boiling, evaporation, condensation, sublimation and deposition. Energy is absorbed to break forces (endothermic) and released when forces form (exothermic).

状态变化涉及的能量变化：熔化、凝固、沸腾、蒸发、凝结、升华和凝华。打破粒子间作用力需要吸热（吸热过程），形成作用力则放热（放热过程）。

Memory trick: ‘MELT’ demands heat, so melting is endothermic. ‘FREEZE’ frees heat, so freezing is exothermic. Also, sublimation is from solid directly to gas – imagine a submarine surfacing quickly (sub-lim-ation).

记忆窍门：熔化（MELT）需要热量，所以是吸热。凝固（FREEZE）释放热量，所以是放热。升华是固体直接变

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