A2 noun 3 min read

법칙

A rule or principle that describes how something in nature or society works.

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Explanation at your level:

A law is a rule. In nature, things follow rules. For example, gravity is a law. It makes things fall down. You can see this law every day when you drop a ball.

A law is a scientific rule that explains how things happen. Scientists study the world and find these laws. For example, the laws of motion tell us how things move when we push them.

In science, a law is a statement based on repeated experiments. It describes a phenomenon that always happens under the same conditions. It is different from a theory, which explains why something happens. You will often hear about the laws of physics or chemistry in school.

The term law is used to denote a consistent, observable pattern in nature. While theories provide explanations, laws provide descriptions, often in mathematical form. Understanding these laws is essential for predicting outcomes in engineering and technology.

Scientific laws represent the pinnacle of empirical observation. They are invariant relationships that hold true across the universe under specific parameters. In academic discourse, distinguishing between a law and a hypothesis is crucial for rigorous scientific inquiry.

The concept of a law in science has evolved from philosophical roots into a cornerstone of modern empiricism. It signifies a profound regularity in the fabric of reality. Whether discussing the laws of thermodynamics or quantum mechanics, the term implies an absolute, non-negotiable adherence to the underlying logic of the physical cosmos.

Word in 30 Seconds

  • A law is a description of a natural phenomenon.
  • It is different from a theory.
  • It is often expressed mathematically.
  • It is a fundamental concept in science.

When we talk about a law in science, we aren't talking about rules written by politicians. Instead, we are talking about the fundamental rules of the universe.

Think of a scientific law as a reliable prediction. If you drop an apple, it hits the ground every single time. Because we have observed this so many times, we call it a law of gravity.

These laws are the bedrock of science. They allow engineers to build bridges, scientists to explore space, and doctors to understand how our bodies function. Without these consistent patterns, the world would be chaotic and unpredictable.

The word law comes from the Old English word lagu, which meant something laid down or fixed. It has deep roots in Germanic languages, reflecting the idea of a standard that cannot be moved.

Historically, the term was used to describe religious or civil codes. It wasn't until the 17th century, during the Scientific Revolution, that thinkers like Isaac Newton began using the term to describe the mathematical regularities found in the physical world.

This shift changed how we view nature. Instead of seeing the world as random, scientists began to see it as a clockwork mechanism governed by precise, unchanging mathematical laws.

You will hear law used in many ways, but in science, it is almost always paired with specific verbs. You discover a law, formulate a law, or obey a law.

In a formal academic context, you might hear phrases like the laws of thermodynamics or Newton's laws of motion. These are standard terms used by physicists and chemists worldwide.

In casual conversation, we use the word more broadly to describe any pattern we see. For example, you might say, "It's a law of nature that my toast always lands butter-side down." This is a lighthearted way of using the term to describe a recurring annoyance.

1. The law of the jungle: Refers to a situation where only the strongest survive. Example: "In this competitive market, it's often the law of the jungle."

2. Lay down the law: To tell people what they must do in a forceful way. Example: "My boss had to lay down the law about office hours."

3. Above the law: Being exempt from rules. Example: "No one is above the law in this country."

4. Take the law into one's own hands: To punish someone yourself instead of going to the police. Example: "He decided to take the law into his own hands."

5. Law and order: A situation where laws are obeyed. Example: "The city is focused on restoring law and order."

The word law is a countable noun. Its plural form is laws. It is often used with definite articles like "the law of gravity" or "a physical law."

Pronunciation-wise, it is a single-syllable word. In US English, the 'aw' sound is often produced with a slightly more open mouth than in British English, where it can sound closer to an 'o'.

It rhymes with words like saw, raw, flaw, jaw, and draw. When using it in a sentence, the stress is always on the word itself as it is a single syllable.

Fun Fact

It shares roots with the word 'lay'.

Pronunciation Guide

UK /lɔː/

Long 'o' sound.

US /lɔ/

Slightly more open 'o' sound.

Common Errors

  • Pronouncing the 'w'
  • Making the vowel too short
  • Adding an extra syllable

Rhymes With

saw raw jaw flaw draw

Difficulty Rating

Reading 1/5

Easy

Writing 2/5

Medium

Speaking 1/5

Easy

Listening 1/5

Easy

What to Learn Next

Prerequisites

rule science fact

Learn Next

theory hypothesis empirical

Advanced

axiom postulate

Grammar to Know

Articles with Nouns

The law.

Subject-Verb Agreement

Laws are.

Pluralization

Law -> Laws.

Examples by Level

1

Gravity is a law.

Gravity = 중력

Simple subject-verb-complement.

2

Nature has laws.

Nature = 자연

Plural noun.

3

It is a law.

It = 그것

Pronoun usage.

4

I study laws.

Study = 공부하다

Action verb.

5

The law is clear.

Clear = 명확한

Definite article.

6

Laws are important.

Important = 중요한

Adjective usage.

7

Do you know the law?

Know = 알다

Interrogative.

8

Science follows laws.

Follow = 따르다

Present simple.

1

The law of gravity makes things fall.

2

Scientists discover new laws.

3

Physics is full of laws.

4

A law describes nature.

5

We learn laws at school.

6

The law is always true.

7

Nature follows a law.

8

Are there laws in biology?

1

Newton's law explains movement.

2

The laws of thermodynamics are complex.

3

It is a fundamental law of nature.

4

Scientists formulated the law years ago.

5

The experiment proved the law.

6

You cannot break the laws of physics.

7

The law is expressed mathematically.

8

Many laws were discovered in the 17th century.

1

The law of conservation of energy is vital.

2

He studied the laws governing fluid dynamics.

3

The theory was elevated to the status of a law.

4

These laws are universally applicable.

5

The law holds true under these conditions.

6

Scientific laws are rarely overturned.

7

She applied the law to her research.

8

The data supports the law perfectly.

1

The law serves as a predictive model for the system.

2

His research challenges the established law.

3

The laws of nature are indifferent to our desires.

4

We must adhere to the laws of logic.

5

The law is a cornerstone of classical mechanics.

6

Empirical evidence confirms the law.

7

The law is subject to rigorous testing.

8

Mathematical laws define the universe's structure.

1

The laws of nature are the bedrock of our understanding.

2

The law functions as an axiomatic truth in this model.

3

Quantum mechanics tests the limits of classical laws.

4

The law is a testament to scientific inquiry.

5

The law is an invariant principle of reality.

6

Scientific laws are the language of the universe.

7

The law remains the primary focus of the study.

8

The law governs the interaction of matter.

Common Collocations

law of nature
scientific law
formulate a law
obey the law
physical law
fundamental law
break the law
universal law
discover a law
apply a law

Idioms & Expressions

"law of the jungle"

survival of the fittest

It's the law of the jungle out there.

casual

"lay down the law"

to dictate rules

The coach laid down the law.

casual

"above the law"

exempt from rules

No one is above the law.

formal

"take the law into one's own hands"

to act as judge/jury

Don't take the law into your own hands.

neutral

"law and order"

peace and compliance

The city needs law and order.

formal

"a law unto oneself"

someone who ignores rules

He is a law unto himself.

neutral

Easily Confused

법칙 vs Theory

Both are scientific terms

Law describes, theory explains

Theory of Evolution vs Law of Gravity

법칙 vs Rule

Both imply order

Rule is human-made, Law is natural

School rule vs Law of nature

법칙 vs Principle

Both are fundamental

Principle is a guiding belief

Scientific principle

법칙 vs Fact

Both are true

Fact is a single event

It is a fact that it fell.

Sentence Patterns

B1

The law of [noun] states that...

The law of gravity states that...

A2

It is a law of [noun] that...

It is a law of nature that...

B2

Scientists formulated the law of...

Scientists formulated the law of motion.

C1

The law governs [noun]...

The law governs planetary motion.

B2

According to the law of...

According to the law of thermodynamics...

Word Family

Nouns

lawyer legal professional

Verbs

outlaw to make illegal

Adjectives

lawful permitted by law

Related

legal related to the law

How to Use It

frequency

8/10

Formality Scale

Academic Formal Neutral Casual

Common Mistakes

Using 'law' to mean 'theory' Use 'theory' for explanations
Laws describe, theories explain.
Confusing 'law' with 'legal rule' Context is key
Science laws are natural, legal laws are human-made.
Forgetting the article The law of...
Usually requires 'the'.
Pluralizing incorrectly Laws
It's a regular noun.
Using 'law' as a verb It is a noun
You cannot 'law' something.

Tips

💡

Memory Palace

Imagine a judge in a lab coat.

💡

Context Matters

Check if you mean science or court.

🌍

Murphy's Law

A cultural, not scientific, law.

💡

Articles

Always use 'the' or 'a'.

💡

The 'aw' sound

Keep it long.

💡

Law vs Theory

Don't mix them up.

💡

Math

Laws are often equations.

💡

Flashcards

Use 'Law of...' phrases.

💡

Formal tone

Use 'formulate' for laws.

💡

Rhymes

Use 'saw' to practice.

Memorize It

Mnemonic

Laws are L-aid down.

Visual Association

A stone tablet with rules.

Word Web

science rules nature physics

Challenge

List 3 laws of nature.

Word Origin

Old English

Original meaning: something laid down

Cultural Context

None, universal term.

Used heavily in both science and legal contexts.

Murphy's Law Newton's Laws

Practice in Real Life

Real-World Contexts

Science Class

  • laws of physics
  • scientific law
  • prove the law

Legal System

  • above the law
  • law and order
  • break the law

Philosophy

  • laws of logic
  • universal law

Daily Life

  • law of the jungle
  • Murphy's law

Conversation Starters

"What is your favorite law of nature?"

"Do you think laws can ever be broken?"

"How does a law differ from a theory?"

"Why are laws important for science?"

"Have you heard of Murphy's Law?"

Journal Prompts

Describe a law of nature you observe daily.

Why do you think humans need laws?

Explain the difference between a rule and a law.

If you could create a new law of nature, what would it be?

Frequently Asked Questions

8 questions

In science, it's a consistent observation.

They can be refined by new data.

Law describes, theory explains.

No, it is used in legal systems too.

No, they are inherent to nature.

Yes.

Laws.

It is neutral but used in formal contexts.

Test Yourself

fill blank A1

Gravity is a ___.

Correct! Not quite. Correct answer: law

Gravity is a natural law.

multiple choice A2

What is a law?

Correct! Not quite. Correct answer: A rule of nature

Laws define natural patterns.

true false B1

A scientific law explains why things happen.

Correct! Not quite. Correct answer: False

Laws describe what happens, theories explain why.

match pairs B1

Word

Meaning

All matched!

Matches scientists/fields to laws.

sentence order B2

Tap words below to build the sentence
Correct! Not quite. Correct answer:

This is a law of nature.

Score: /5

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