conservation of mass: meaning, definition, pronunciation and examples
Low-frequencyAcademic / Scientific / Technical
Quick answer
What does “conservation of mass” mean?
A fundamental principle in physics stating that the total mass in an isolated system remains constant over time, regardless of physical or chemical changes within the system.
Audio
Pronunciation
Definition
Meaning and Definition
A fundamental principle in physics stating that the total mass in an isolated system remains constant over time, regardless of physical or chemical changes within the system.
The concept that matter cannot be created or destroyed, only transformed or rearranged. While modern physics (via mass-energy equivalence) has refined this, it remains a foundational conservation law in classical mechanics and chemistry.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling follows regional conventions (e.g., 'centre' vs. 'center' in surrounding text).
Connotations
Identical technical/scientific connotations in both dialects.
Frequency
Frequency is tied entirely to scientific/educational contexts and is identical in both varieties.
Grammar
How to Use “conservation of mass” in a Sentence
The [experiment/calculation] demonstrates [the] conservation of mass.According to [the law of] conservation of mass, [...]This is a direct consequence of conservation of mass.Vocabulary
Collocations
Examples
Examples of “conservation of mass” in a Sentence
verb
British English
- The reaction products must conserve mass.
- We need to check the system conserves mass.
American English
- The process must conserve mass.
- Does this model conserve mass?
adverb
British English
- The process proceeds mass-conservatively.
American English
- Mass is conserved perfectly in this simulation.
adjective
British English
- This is a mass-conserving system.
- The mass-conservation principle is key.
American English
- We require a mass-conservative approach.
- The mass-conservation law is inviolable.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Core concept in physics, chemistry, and engineering education and research.
Everyday
Rarely used outside of educational discussions or science documentaries.
Technical
Fundamental axiom in chemical engineering, fluid dynamics, and reactor design.
Vocabulary
Synonyms of “conservation of mass”
Strong
Neutral
Weak
Vocabulary
Antonyms of “conservation of mass”
Watch out
Common Mistakes When Using “conservation of mass”
- Using a plural verb (e.g., 'The conservation of mass are...'). Treat it as singular.
- Confusing it with 'conservation' in an ecological sense.
- Misspelling 'mass' as 'mats' or 'muss'.
FAQ
Frequently Asked Questions
In classical physics and chemistry, yes. In nuclear reactions or relativistic scenarios, mass can be converted to energy, so the more general law is the conservation of mass-energy.
It is often attributed to Antoine Lavoisier in the late 18th century, who formulated it based on precise measurement in chemical reactions.
They were historically separate laws. Conservation of mass deals with matter, conservation of energy with the capacity to do work. Einstein showed they are two aspects of a single conserved quantity: mass-energy.
It's the basis for 'mass balance' calculations essential in designing anything from chemical plants and engines to water supply networks, ensuring all inputs and outputs are accounted for.
A fundamental principle in physics stating that the total mass in an isolated system remains constant over time, regardless of physical or chemical changes within the system.
Conservation of mass is usually academic / scientific / technical in register.
Conservation of mass: in British English it is pronounced /ˌkɒnsəˈveɪʃən əv ˈmæs/, and in American English it is pronounced /ˌkɑːnsərˈveɪʃən əv ˈmæs/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a sealed box. You can change what's inside (melt ice, burn paper), but if you weigh the whole box, the weight stays the same. Nothing gets in, nothing gets out – mass is conserved.
Conceptual Metaphor
MASS IS A SUBSTANCE / QUANTITY (a fixed, measurable amount that can be poured, transformed, or balanced but not made from nothing).
Practice
Quiz
What does the principle of conservation of mass primarily state?