Molecules: Composed of atoms, molecules are the smallest units of a substance that retain the chemical properties of that substance.
Momentum: The product of mass and velocity.
Molecules Molecules are the tiny particles which form various substances. For example, air is composed of many billions of oxygen, nitrogen and Carbon Dioxide molecules.
Because water molecules absorb microwaves and other radio wave frequencies, water in the atmosphere attenuates radar signals.
The number of air molecules above a surface changes as the height of the surface above the ground changes. For example, there are fewer air molecules above the 50 kilometer (km) surface than are found above the 12 km surface.
It is measured on an arbitrary scale from absolute zero, where the molecules theoretically stop moving. It is also the degree of hotness or coldness.
It is also a measure of the average speed or kinetic energy of the atoms and molecules in a substance.
The phenomenon by which water is held in interstices above the normal hydrostatic level, due to attraction between water molecules.
OZONE: About 12 ozone molecules for 1 million air molecules. 2. OZONE: Antarctic Ozone Hole expands in winter shrinks in summer. 3. OZONE: Been measured by the British since 1956. 4. OZONE: Concentration in stratosphere remains constant. 5.
The exact physical nature of the small ion has never been fully clarified, but much evidence indicates that each is a singly charged atmospheric molecule (or, rarely, an atom) about which a few other neutral molecules are held by the electrical ...
According to the kinetic theory of gases, evaporation occurs when liquid molecules escape into the vapor phase as a result of the chance acquisition of above-average, outward-directed, ...
water molecules absorb 80 calories per gram to change from the solid (ice) to the liquid (water) state at 0 °C
water molecules release 80 calories per gram to change from the liquid (water) state to thesolid (ice) at 0 °C ...
When ultraviolet light waves (UV) strike CFC* (CFCl3) molecules in the upper atmosphere, a carbon-chlorine bond breaks, producing a chlorine (Cl) atom.
The amount of force exerted over a surface area, caused by the weight of air molecules above it. As elevation increases, fewer air molecules are present. Therefore, atmospheric pressure always decreases with increasing height.
crystal - A more or less regular periodic array of atoms, molecules, or ions, usually forming a solid. In everyday parlance crystal is used in a bewildering variety of ways, sometimes contradictory.
Avogadro's Number - The number of molecules in one mole of gas (6.022.169 X 1023 per mole).
Air in motion relative to the earth's surface, caused by the average movement of a "large number" of molecules of air, usually with scales larger than the random motions of individual molecules; ...
Sunlight is scattered by molecules and particles rendering these bright rays visible. Contrast is enhanced by haze, dust, or mist. These rays are more likely to be seen in the late afternoon, as clouds come between the sun and the observer.
It is a physical quantity characterising the random motion of molecules within a body. The most common scale is the Celsius scale with 0°C the freezing point of water at sea level. This corresponds to 273.
The warming that takes place when molecules in the atmosphere trap heat radiating away from the surface and redirect it back toward Earth.
Ground Frost
A temperature of 0 degrees Celsius or below recorded on a thermometer placed on short grass ...
Vapor Pressure The pressure exerted by water vapor molecules in a given volume of air.
Variable Ceiling A ceiling of less than 3,000 feet which rapidly increases or decreases in height by established criteria during the period of observation.
73 cm, and the force that tries to restore them to equilibrium is the cohesion of the individual molecules. Capillary waves are important in starting the process of energy transfer from the air to the water.
OZONE: A form of oxygen containing 3 molecules, usually found in the stratosphere, and responsible for filtering out much of the sun's ultraviolet radiation.
PACIFIC HIGH: A semipermanent anticyclone located in the Eastern North Pacific.
PRECIPITATION: Liquid or solid water molecules that fall from the atmosphere and reach the ground.
PRESSURE: The force exerted by the interaction of the atmosphere and gravity. Also known as atmospheric pressure.
Evaporation- The process by which water molecules in liquid water escape into the air as water vapor.
Exosphere- The outer layer of the thermosphere, extending outward into space.
Air pressure The cumulative force exerted on any surface by the molecules composing air; usually expressed as the weight of a column of air per unit surface area.
Air pressure gradient Change in air pressure with distance.
It is formed in the upper atmosphere through the dissociation of oxygen molecules by solar radiation. In the lower troposphere, it is a pollutant which characterizes photochemical or Los Angeles-type smog.
AIR DENSITY - The amount of air in mass per unit volume. Dense air has less molecules per unit volume than less dense air. Air density decreases with altitude and with increasing temperature.
Greenhouse Effect- The warming that takes place when molecules in the atmosphere trap heat radiating away from the surface and redirect it back toward Earth.
Temperature A physical quantity characterizing the mean random motion of molecules in a physical body. In other words, it is a measure of the degree of hotness or coldness of a substance.
conduction: transfer of energy through a body by particles or molecules within that body. Energy flows from the hotter parts to the cooler parts.
Temperature - A degree of hotness or coldness the can be measured using a thermometer. Also a measure of how fast the atoms and molecules of a substance are moving (see Kinetic energy).
VAPOR PRESSURE- The amount of pressure (usually expressed in millibars) exerted from molecules of water vapor independent from the pressure exerted from the air. The vapor pressure is a trace to about 4% of the total air pressure at any one time.
Ultraviolet (UV) (or Ultraviolet Radiation) - Ultraviolet radiation from the sun plays a role in the formation of the ozone layer by acting as a catalyst for a chemical reaction that breaks apart oxygen molecules which then recombine to form ...
Radiant energy (radiation) Energy propagated in the form of electromagnetic waves. These waves do not need molecules to propagate them, and in a vacuum they travel at nearly 300,000 kilometers per second.
Air Parcel An imaginary small body of air that is used to explain the behavior of air. A parcel is large enough to contain a very great number of molecules, ...
69/ x 1016 molecules of ozone/cm2.DOCDepartment of CommerceDOHDevelopment and Operations HydrologistDoldrumsThe regions on either side of the equator where air pressure is low and winds are light.
Unit used to measure the abundance of ozone in the atmosphere. One Dobson unit is the equivalent of 2.69/ x 1016 molecules of ozone/cm2.
DOC
Department of Commerce ...
Energy propagated in the form of electromagnetic waves. These waves do not need molecules to propagate them, and in a vacuum they travel at nearly 300,000 km per sec.
Radiation(1) ...
Conduction - The transfer of heat through matter by molecular activity. Energy is transferred during collisions among molecules.
TEMPERATURE - The measure of heat of matter, characterized by the average kinetic energy of the matter atoms or molecules. Common units are degrees Fahrenheit (F), Celsius (C), or Kelvins (K).
Unless otherwise defined, the liquid is generally assumed to be water. (2) The phenomenon by which water is held in interstices above the normal hydrostatic level, due to attraction between water molecules.
 See also: Air, Atmosphere, Surface, Water, Temperature
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