physical change
[ˈfɪzɪkəl tʃeɪndʒ]
nounpl: physical changes
mudança física
1. A transformation in the appearance or physical properties of a substance without altering its chemical composition or molecular structure
When ice melts into water, it is a physical change because the chemical composition remains H₂O.
Quando o gelo derrete e vira água, é uma mudança física porque a composição química continua sendo H₂O.
2. A change that can typically be reversed and does not produce a new substance
Cutting paper into smaller pieces is a physical change.
Cortar papel em pedaços menores é uma mudança física.
3. In human biology, alterations in body structure or appearance during development, such as puberty
The teenager experienced significant physical changes during puberty.
O adolescente experimentou mudanças físicas significativas durante a puberdade.
The term 'physical change' is predominantly used in educational and scientific contexts in both Brazil and the United States. In Brazilian schools, it's a standard chemistry and physics concept taught at the middle school level. The term also carries social significance when discussing bodily transformations during adolescence, which is an important topic in health education programs across both countries.
Related Idioms & Phrases
physical change of heart - a visible or notable change in someone's physical appearance or demeanor
undergo physical changes - to experience transformation in one's body or appearance
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