Convection, Radiation, Convection

Radiation, Convection, Conduction

"Convection" has several, related meanings in weather....but it always involves rising air. It usually refers to "moist convection", where the excess water vapor in rising air parcels condenses to form a cloud. The heat released through this condensation can help to sustain the convection by warming the air further and making it rise still higher. Radiation is energy that comes from a source and travels through some material or through space. Light, heat and sound are types of radiation. The kind of radiation discussed in this presentation is called ionizing radiation because it can produce charged particles (ions) in matter.

Ionizing radiation is produced by unstable atoms. Unstable atoms differ from stable atoms because they have an excess of energy or mass or both.Unstable atoms are said to be radioactive. In order to reach stability, these atoms give off, or emit, the excess energy or mass., which causes more water vapor to condense, so the process feeds on itself. Conduction is the transfer of heat from one molecule to another through a substance. Not all substances conduct heat at the same speed. Metals and stone are considered good conductors since they can speedily transfer heat, but wood, paper, air, and cloth are poor heat conductor.

Convection, Radiation, Conduction

Heat Transfer Song