Substances can change from one state to another | IGCSE Change of matter | #science #igcse

Added: 2026-05-17

[00:00:00]Substances can change from one state to another.

[00:00:03]When a solid is heated, its particles gain more energy.

[00:00:07]This makes the particles vibrate more, which weakens the forces that hold the solid together. This makes the solid expand.

[00:00:15]At a certain temperature, the particles have enough energy to break free from their positions.

[00:00:20]This is called melting and the solid turns into a liquid.

[00:00:24]When a liquid is heated, again the particles get even more energy. This energy makes the particles move faster, which weakens and breaks the bonds holding the liquid together.

[00:00:35]At a certain temperature, the particles have enough energy to break their bonds.

[00:00:39]This is called evaporating and the liquid turns into a gas.

[00:00:44]Solid to gas is called sublimation.