Words like force, work, or reaction have specific, unambiguous meanings, so results can be compared worldwide.
A kilogram of rice must mean the same thing everywhere.
A regular, repeatable pattern — Newton's laws, the jerk when a bus stops.
Explains WHY a pattern occurs — atomic theory, how molecules form.
A broad idea applied to a situation — conservation of energy, climbing stairs.
Well-established laws let scientists anticipate outcomes before testing them.
When a prediction fails, scientists re-examine assumptions rather than reject the evidence.
Particle motion.
Polymer fibres.
Virus size.
Airflow modelling.
A simplified representation of a real system.
A regular pattern in nature, often mathematical.
An evidence-based explanation of why something happens.
A broad scientific idea applied to a situation.
A reasoned expectation based on evidence.
A rough calculation to check if an answer is reasonable.
Internationally agreed standard units.