Multiple Choice Quiz

Choose the best answer.

1		This term describes the maximum amount of water that can exist in the atmosphere as a vapor.
			A)	capacity
			B)	saturation
			C)	load
			D)	dew point temperature
2		Each gram of water that evaporates carries with it approximately how many calories of latent heat.
			A)	200
			B)	400
			C)	600
			D)	800
3		Supercooled water is water existing in the liquid phase with a temperature less than:
			A)	10°C
			B)	5°C
			C)	0°C
			D)	15°C
4		The two most common gases present in the Earth's atmosphere are:
			A)	oxygen and nitrogen
			B)	neon and oxygen
			C)	nitrogen and helium
			D)	argon and nitrogen
5		The relationship between temperature and relative humidity is an example of an "inverse relationship" which means that:
			A)	a decrease in one variable results in a decrease change in another variable
			B)	if one variable decreases no changes occur in other variables
			C)	if one variable increases all other variables will also increase
			D)	an increase in one variable is matched by a decrease in another variable
6		Instruments that measure relative humidity are called:
			A)	barometers
			B)	hygrometers
			C)	hydrometers
			D)	hydroscopes
7		Dew and frost are most likely to form on a night when which of the following conditions are present.
			A)	clear and calm
			B)	overcast and calm
			C)	clear and windy
			D)	overcast and windy
8		During humid weather in the summertime, haze is often made more visible by condensation onto hygroscopic nuclei at relative humidities as low as:
			A)	90%
			B)	80%
			C)	70%
			D)	60%
9		When condensation above 0°C takes place without benefit of a seed nucleus the process is called:
			A)	contact nucleation
			B)	homogeneous nucleation
			C)	spontaneous nucleation
			D)	heterogeneous nucleation
10		In a cloud just a few degrees colder than freezing, virtually every particle is in the liquid phase. As the temperature drops, more and more ice is present until all the cloud particles become ice crystals at temperatures colder than:
			A)	-15°C
			B)	-19°C
			C)	-29°C
			D)	-39°C