atom
An atom is the smallest possible part of a chemical element. Everything in the world is made of millions of these very tiny particles.
例文
3 / 5A water molecule has two hydrogen atoms.
Water is made of two small hydrogen parts.
The scientist studied the structure of the atom.
The researcher looked at how an atom is built.
I don't have an atom of energy left today.
I have no energy at all left today.
語族
覚え方のコツ
Think of 'A-tom' as 'A tiny object' or 'A tiny man' called Tom to remember it is a small unit.
クイックテスト
Everything in the world is made of tiny particles called _____.
正解！
正解は： atoms
例文
A water molecule has two hydrogen atoms.
everydayWater is made of two small hydrogen parts.
The scientist studied the structure of the atom.
formalThe researcher looked at how an atom is built.
I don't have an atom of energy left today.
informalI have no energy at all left today.
Carbon atoms are the basis of all life on Earth.
academicSmall carbon parts are what all living things are made of.
Our company checks every atom of the production process.
businessThe business looks at every tiny detail of how things are made.
語族
よく使う組み合わせ
よく使うフレーズ
split the atom
to achieve something very difficult in science
not an atom of
not even a tiny amount of something
atomic age
the period of history starting with nuclear power
よく混同される語
An atom is a single unit, while a molecule is a group of atoms joined together.
A cell is a unit of living things; atoms are much smaller and make up both living and non-living things.
使い方のコツ
In science, 'atom' refers to the physical particle. In literature or daily speech, it is often used to mean 'the smallest possible amount' of a feeling or quality.
よくある間違い
Learners sometimes use 'atom' when they should use 'molecule' for substances like water (H2O) which are groups of atoms.
覚え方のコツ
Think of 'A-tom' as 'A tiny object' or 'A tiny man' called Tom to remember it is a small unit.
語源
From the Greek word 'atomos', which means 'indivisible' or 'something that cannot be cut'.
文法パターン
文化的な背景
The 'splitting of the atom' is a major historical event associated with the end of World War II and the start of modern energy.
クイックテスト
Everything in the world is made of tiny particles called _____.
正解！
正解は： atoms
関連語彙
scienceの関連語
velocity
A1Velocity describes how fast an object moves in a specific direction. It is a technical word for speed used often in science and math.
momentum
A1Momentum is the power that a moving object has to keep moving. It depends on how heavy the object is and how fast it is going. It is also used to describe a plan or project that is growing and becoming more successful.
magnetism
A1Magnetism is a physical force that pulls certain metals toward each other or pushes them away. It is also used to describe a special charm that attracts people to a person.
radiation
A1Radiation is energy that travels through space as waves or very small particles. It comes from natural sources like the sun and from machines like X-rays in hospitals.
wavelength
A1Wavelength is the distance between two peaks of a light or sound wave. It is also used to describe when people have the same ideas and understand each other.
optics
A1Optics is the branch of science that studies light and how it interacts with things like lenses and mirrors. In modern usage, it also refers to how an event or action is seen by the public.
thermodynamics
A1Thermodynamics is the study of heat and how it moves. It explains how energy changes from one form to another, such as how heat can turn into movement.
reaction
A1A reaction is a response to an action or a situation. In science, it is what happens when two or more substances are mixed together to create a change.
solution
A1A solution is a liquid mixture where a solid or gas is fully mixed into a liquid. It also means the correct answer to a problem or a difficult puzzle.
acid
A1A chemical substance that usually has a sour taste and can sometimes burn or dissolve things. In science, it is a liquid with a pH level of less than seven.
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