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heat transferclick to hear

Heat transfer occurs in three ways that are related to molecular movement: conduction, convection and radiation.
heat transfer liquid convection current flame vapor solid radiation convection conduction

liquid click to hear

Matter having a definite mass and volume but no shape; its atoms are relatively mobile in relation to each other.

convection current click to hear

Movement of fluid caused by a difference in density, which transfers heat. The heated water rises and is replaced by the cooler water from the surface.

flame click to hear

Incandescent gas resulting from the combustion of a mixture of gas and air; it produces heat and light.

vapor click to hear

Gaseous state of water above its boiling point (water boils and is converted to vapor at 212°F or 100°C).

solid click to hear

Rigid body possessing mass, volume and a definite form; its atoms are linked to each other and are almost completely at rest.

radiation click to hear

Heat generation in the form of electromagnetic waves emitted by a heated body (solid, liquid or gas).

convection click to hear

Heat generation in a fluid that is caused by a variation in temperature resulting from the movement of molecules. Here, the heated water expands, rises and releases its heat to the surrounding air.

conduction click to hear

Heat generation in a body (usually a solid) or between two bodies in contact; the molecules vibrate but no matter moves.