Changes in State of Matter

Foam is a poor conductor of heat because it contains trapped air pockets, making it an effective thermal insulator.

Metals are thermal conductors because their free electrons can transfer kinetic energy rapidly through the material. This allows heat to flow efficiently from hot to cold regions.

Thermal insulators are materials that resist the flow of heat energy, meaning they do not transfer heat well.

Thermal conductors allow heat to flow through them easily due to their molecular structure. Metals are excellent conductors because free electrons transfer heat energy rapidly.

Evaporation is the process where liquid water turns into water vapor at temperatures below the boiling point.

Condensation is the phase change where a gas loses energy, cools down, and transitions into a liquid state.

Magma is molten rock found beneath the Earth's surface. It is formed when solid rock is heated until it melts.

Melting is the process of changing a solid into a liquid, which requires the addition of heat energy.

The boiling point is the specific temperature at which the vapor pressure of a liquid equals the external pressure, causing the liquid to turn into a gas.

Deposition is the phase change where a gas transitions directly into a solid without becoming a liquid first, such as water vapor forming snow.

Sublimation is the process where a solid changes directly into a gas, bypassing the liquid phase.

Freezing is the phase change where a liquid loses heat energy and becomes a solid.

The three fundamental states of matter commonly taught in introductory science are solid, liquid, and gas.