Name:  _________________________________________________________

Chapter 4:  Humidity, Condensation, and Clouds

1.	(a)  Define the concept of Relative Humidity (R.H.)?  (1 Point)
	Relative Humidity is the amount of water vapor in the atmosphere compared to the amount that could exist in the atmosphere under current conditions.
	(b)  Explain two scenarios that would lower the Relative Humidity in a sample of air.  (2 Points)
	Raising temperature would increase the amount of water vapor that could 	exist in the atmosphere. A decrease in humidity would have the same effect.
2.  	(a)  Define the concept of dew point temperature.  (1 Point)
     	The Dew Point Temperature is the temperature at which water vapor will 	condense.
	(b)  How is the difference between air temperature and the dew point (also known as the dew
	       point depression or DD = T-Td) related to Relative Humidity?  (2 Points)
	They both show the amount of water vapor in the atmosphere relative to how 	much could potentially be in the atmosphere.
3.  	List the two primary ways fog forms.  (2 Points)
	
4.	Describe radiation fog, including the conditions that cause it.  (2 Points) 
	Radiation Fog occurs due to the cooling of the ground to a temperature 	below the dew point. Through conduction, the small portion of the 	atmosphere directly above the ground as well as its contained water vapor is 	also cooled below the dew point, and its vapor condenses, forming a cloud.
5. 	Which clouds are associated with each of the following characteristics:  (2 Points total)

(a)  a “mackerel” sky              	(b)  lightning and hail                       	(c)  halos around the sun or moon
      Altocumulus 		       Cumulonimbus 			Cirrus
(d)  a “watery” sun                       (e)  wispy, mares’ tails                      	(f)  drizzle
	      Altostratus			Cirrus			        Stratocumulus 
(g)  light to moderate, continuous rain or snow                      (h)  thunderstorms
		
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Chapter 5:  Cloud Development and Precipitation

6.  	Comprehensively describe the adiabatic process.  (4 Points)
  
7.	Tell me why is it warmer and drier on the leeward side of some mountain ranges,  
            which many times help form rain shadow deserts.  (4 Points)
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2-Point BONUS QUESTIONS

1.  	Which type of satellite would be able to provide you with a time-sequenced, loop of images
            (movie) that are 15 minutes apart?

2.	Why does a rising, saturated parcel of air cool at a lesser rate (the moist adiabatic rate) than 
             a rising, unsaturated parcel of air (which cools at the dry adiabatic rate)?