because the particles
Most substances expand when heated.
they expand
materials usually expand when heated.
When heated, most substances expand due to the increase in kinetic energy of their atoms or molecules. This leads to an increase in the average distance between the particles, causing the substance to expand.
expand
A substance in the solid phase will typically expand when heated. Most substances when heated sufficiently will melt into a liquid, assuming that they do not combust or sublimate.
The coefficient of _____ expansion. It depends what kind of expansion you are talking about.
When substances are heated, typically their molecules gain energy and begin to move more rapidly. This increased movement can cause the substance to expand, change phase (from solid to liquid or gas), or even chemically react to form new substances. The specific changes depend on the substance's properties.
It contracts when heated from 0 deg C to 4 deg C. Other substance expand when heated.
When substances are heated, their molecules gain kinetic energy and vibrate more rapidly. This increased motion causes the molecules to move further apart from each other, leading to expansion. The expansion occurs because the increased distance between the molecules results in a larger volume occupied by the substance.
Oil does expand when heated and contracts when cooled.
Most substances expand when heated, but water is an exception. Water contracts when heated from 0°C to 4°C before expanding as it heats up further.