Gas is a state of matter characterized by its indefinite shape and volume, able to fill any container.
الكلمة في 30 ثانية
- Matter in a state without fixed shape or volume.
- Molecules move freely, filling containers.
- Used in science, environment, and daily life.
Overview
“气体” (qìtǐ) 是一个描述物质状态的名词，指代那些没有固定形状和体积，能够充满整个容器的物质。与固态和液态相比，气体的分子运动更为自由，分子间的平均距离也更大。这种特性使得气体能够被压缩，也能自由地向四周扩散。例如，我们呼吸的氧气、大气层中的氮气、燃烧产生的二氧化碳等都是气体的具体例子。
“气体”一词在科学、技术、环保以及日常生活中都有广泛的应用。在科学语境下，它常用于描述物质的状态变化（如蒸发、升华），或者讨论气体的性质（如密度、压力、温度）。在环保领域，人们关注的是有害气体（如温室气体、污染物气体）的排放和治理。在日常交流中，它可能指代某些特定的气体，如天然气（用于烹饪、取暖）或医用气体（如氧气）。
**科学与化学**: 讨论物质的三态变化，如水的三态（固态冰、液态水、气态水蒸气）。2. **环境科学**
讨论空气污染、温室效应、气体排放标准等。3. 日常生活: 提及家用燃气（天然气、液化石油气）、呼吸气体（氧气）、汽车尾气等。4. 工业与技术: 提及工业气体（如氮气、氩气用于焊接）、制冷剂气体等。
**“烟雾” (yānwù)**: 通常指燃烧产生的可见颗粒物和气体的混合物，带有污染或模糊的含义。
“气体”是一个中性且科学的术语，涵盖了所有符合其物理特性的物质状态。而“气”则更口语化和泛化，“蒸汽”有特定的来源，“烟雾”则多指混合物和污染。
أمثلة
呼吸新鲜空气对健康很重要，空气是一种由多种气体组成的混合物。
everydayBreathing fresh air is important for health; air is a mixture composed of various gases.
在化学实验中，我们需要精确控制各种气体的流量和压力。
academicIn chemical experiments, we need to precisely control the flow rate and pressure of various gases.
请检查一下煤气灶是否关好，以免有气体泄漏。
informalPlease check if the gas stove is turned off properly to avoid gas leaks.
全球变暖主要是由于大气中温室气体浓度的增加所致。
formalGlobal warming is primarily caused by the increase in the concentration of greenhouse gases in the atmosphere.
تلازمات شائعة
العبارات الشائعة
天然气
natural gas
氧气
oxygen
二氧化碳
carbon dioxide
يُخلط عادةً مع
“气” is a broader term that can refer to air, breath, mood, or even traditional Chinese medicine concepts. While it can sometimes be used informally to mean gas, '气体' is the precise scientific term for the state of matter.
“蒸汽” specifically refers to the gaseous state of a substance that is normally liquid or solid at room temperature, typically water vapor. '气体' is a general term for any substance in the gaseous state.
أنماط نحوية
How to Use It
ملاحظات الاستخدام
The term '气体' is primarily used in scientific, technical, and environmental contexts. It is a neutral and precise term. In everyday conversation, shorter terms like '气' (as in '煤气' - coal gas/town gas) might be used, but '气体' is preferred for clarity and accuracy.
أخطاء شائعة
Confusing '气体' with '空气' (air) or '蒸汽' (steam). Remember that air is a specific mixture of gases, and steam is the gaseous form of water, while '气体' is the general term for the state of matter.
Tips
Think of Gas as Free Molecules
Imagine gas molecules as tiny dancers constantly moving around freely in a large ballroom, with lots of space between them.
Be Aware of Invisible Gases
Many gases are invisible and odorless, so safety precautions are crucial when dealing with potentially harmful or flammable gases.
Air Quality Matters
In many cultures, the quality of the air (a mixture of gases) is a significant concern, impacting health and the environment.
أصل الكلمة
The word '气体' is composed of '气' (qì), meaning 'air' or 'breath', and '体' (tǐ), meaning 'body' or 'form'. It literally translates to 'air form' or 'breath body', aptly describing its nature.
السياق الثقافي
Discussions about air pollution and the quality of the air we breathe are common globally, reflecting the importance of gases to life and the environment.
نصيحة للحفظ
Think of '气体' (qìtǐ) as 'energy body' - molecules have so much energy they bounce around freely, filling any space they are in.
الأسئلة الشائعة
4 أسئلة“空气”特指地球大气层中由多种气体混合而成的混合物，主要成分是氮气和氧气。“气体”则是一个更广泛的物理概念，泛指所有处于气态的物质，空气只是气体的一种具体存在形式。
这是因为气体的分子间作用力非常微弱，分子运动非常活跃且随机。它们会不断碰撞容器壁，并扩散到所有可用的空间，因此无法保持固定的形状和体积。
在常温常压（大约25°C，1个标准大气压）下，常见的气体包括氧气（O₂）、氮气（N₂）、氢气（H₂）、二氧化碳（CO₂）、氦气（He）、氖气（Ne）等。
不完全是。“气体”是一个总称。而“蒸汽”特指由液体（如水）受热汽化而形成的气体状态。例如，水蒸气是一种气体，但并非所有的气体都是由液体蒸发而来的。
اختبر نفسك
燃烧会产生大量的二氧化碳______，对环境造成影响。
二氧化碳在常温常压下是气态物质，所以用“气体”填空最合适。
以下哪项不是气体的基本特性？
气体的分子间作用力非常弱，这是它能自由扩散、没有固定形状和体积的原因。
请选择正确的句子。
这是一个主谓宾结构清晰的句子，表达了气体可以充满整个容器的特性。
النتيجة: /3
Summary
Gas is a state of matter characterized by its indefinite shape and volume, able to fill any container.
- Matter in a state without fixed shape or volume.
- Molecules move freely, filling containers.
- Used in science, environment, and daily life.
Think of Gas as Free Molecules
Imagine gas molecules as tiny dancers constantly moving around freely in a large ballroom, with lots of space between them.
Be Aware of Invisible Gases
Many gases are invisible and odorless, so safety precautions are crucial when dealing with potentially harmful or flammable gases.
Air Quality Matters
In many cultures, the quality of the air (a mixture of gases) is a significant concern, impacting health and the environment.
أمثلة
4 من 4呼吸新鲜空气对健康很重要，空气是一种由多种气体组成的混合物。
Breathing fresh air is important for health; air is a mixture composed of various gases.
在化学实验中，我们需要精确控制各种气体的流量和压力。
In chemical experiments, we need to precisely control the flow rate and pressure of various gases.
请检查一下煤气灶是否关好，以免有气体泄漏。
Please check if the gas stove is turned off properly to avoid gas leaks.
全球变暖主要是由于大气中温室气体浓度的增加所致。
Global warming is primarily caused by the increase in the concentration of greenhouse gases in the atmosphere.
Related Content
مزيد من كلمات science
吸收
A1To absorb; to take in.
海拔
B1The height of an object or place above sea level.
属性
B1A quality or feature that is typical of or belongs to something or someone.
生物
B1Any living thing, or the study of living organisms. Basic term for IELTS biology-related reading passages.
模糊
A1Blurry; vague; indistinct.
呼吸
A1To breathe; respiration.
燃烧
A1To burn; combustion.
计算
A1To calculate; to compute; to determine a value mathematically.
推算
B1To calculate, estimate, or figure out something using data, logic, or mathematical methods. It implies a process of reasoning from known facts to unknown values.
校准
B1To calibrate, adjust, or check for accuracy against a standard. It is used for instruments, data, or plans.
