# weather - Chapter 4 Temperature(85 A measure of the average...

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Chapter 4 Temperature (85) – A measure of the average kinetic energy of the individual atoms or molecules composing a substance. Internal energy (85)- A measure of the molecular activity of a system or the summation of total energies of all molecules in a specific mass. Heat (85)- A form of energy transferred between systems or components of a system in response to differences in temperature. Absolute zero (85)- The theoretical temperature which a body does not emit electromagnetic radiation and all molecular motion ceases. Calorie (cal) (86)- The amount of heat needed to raise the temperature of one gram of water one Celsius degree. British thermal unit (Btu) (86)- The quantity of heat needed to raise the temperature of one pound of water one Fahrenheit degree. Thermometer (86)- Instrument used for measuring temperature by incorporating a thermal sensor that utilizes the variation of the physical properties of substances according to their thermal states. Thermograph (87)- A recording instrument that provides a continuous trace of temperature variations with time. Temperature gradient (88)- Temperature change with distance. Second law of thermodynamics (88)- All systems tend towards a state of disorder. Radiational heating (88)- The rise in temperature of an object or a surface accomplished whenever the object or surface undergoes a net gain of heat due to a greater rate of absorption of electromagnetic radiation than emission. Radiational cooling (88)- The drop in temperature of an object or a surface accomplished whenever the object or surface undergoes a net loss of heat due to a greater rate of emission of electromagnetic radiation than absorption. Conduction (of heat) (89)- Transfer of kinetic energy of atoms or molecules via collisions between the neighboring atoms or molecules. Heat conductivity (89)- The ratio of the rate of heat transport across an area to a temperature gradient. Convection (90)- The transport of heat within a fluid via motions of the fluid itself.

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Latent heat (90)- The quantity of heat involved in the phase changed of water. Latent Heating (91)- Transport of heat from one place to another within the atmosphere as a consequence of phase changes of water. Specific heat (91)- The amount of heat required to raise the temperature of 1 gram of a substance by 1 Celsius degree. Thermal inertia (92)- Resistance to a change in temperature. Latent heat of fusion (95)- Heat released to the environment when water changed phase from liquid to solid. Latent heat of vaporization (95)- Heat required to change the phase of water from liquid to vapor. Sensible heating (95)- Transport of heat from on location or object to another via conduction, convection or both. Cumulus clouds (95)- Vertically developed clouds that form as a consequence of the
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## This note was uploaded on 09/12/2008 for the course GEOS 220 taught by Professor Mountain during the Spring '08 term at University of Louisville.

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weather - Chapter 4 Temperature(85 A measure of the average...

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