Multiple choice: 1. which below is not one of the ingredients for a major build-up of air pollutants? a) light surface winds c) sinking air aloft e a deep mixing layer b) a strong subsidence inversion d) clear skies with rapid radiational cooling at night 2. which below is not a name given to a large cyclonic storm system that forms in the middle latitudes? a) wave cyclone c) anticyclone b) middle latitude cyclonoe d) extratropical cyclone 3. ordinary cell thunderstorms only last about one hour and begin to dissipate when a) lightning neutralizes all the electrical charge in the cloud b) all the precipitation particles in the cloud turn to ice c) the downdraft spreads throughout the cloud and cuts off the updraft d) solar heating at the ground begins to decrease 4. on a foggy night it is usually difficult to see the road when high beam headlights are on because of the a) scattering of light b) absorption d) refraction 21 c transmission 5. halos are caused by a) refraction of light passing through raindrops b) scattering of light by ice crystals c) refraction of light passing through ice crystals d) diffraction of light by cloud droplets e) reflection of light by ice crystals