ATM S 103 UW Midterm 1 With
Complete Solution
What are the three ingredients needed for cloud formation? - ANSWER
-Water vapor
-Cooling (the air has to cool to saturation in order for condensation to occur)
-Cloud condensation nuclei (CCN)
What are the three states of water and the bonds associated with them? -
ANSWER -Gas (vapor): All bonds are broken and it is invisible
-Liquid (droplets): Some bonds are broken
-Solid (ice): No bonds are broken
What two states of water make up clouds? - ANSWER Solid (ice crystals) and
liquid (water droplets)
What is latent heat? - ANSWER The energy (heat) required to break
molecular bonds and only happens when the state changes
What is evaporation? - ANSWER Liquid droplets to water vapor
, Ex: Sweat; latent heat is needed for cooling
What is condensation? - ANSWER Water vapor to liquid droplets (occurs
when the air parcel is saturated)
Ex: Formation of cloud droplets; latent heat is released warming the air
When is an air parcel saturated? - ANSWER -When its vapor vapor pressure
exceeds its saturation vapor pressure
-When its relative humidity becomes greater than 100%
-When its temperature reaches dew point
What are the two measures of humidity? - ANSWER -Relative humidity (%)
-Dew point (in C or F)
What is relative humidity? - ANSWER The ratio of actual vapor pressure to
saturation vapor pressure (the ratio of water vapor content to water vapor
capacity).
What is vapor pressure? - ANSWER The net force per unit area exerted by
molecules of water vapor in a parcel of air
Complete Solution
What are the three ingredients needed for cloud formation? - ANSWER
-Water vapor
-Cooling (the air has to cool to saturation in order for condensation to occur)
-Cloud condensation nuclei (CCN)
What are the three states of water and the bonds associated with them? -
ANSWER -Gas (vapor): All bonds are broken and it is invisible
-Liquid (droplets): Some bonds are broken
-Solid (ice): No bonds are broken
What two states of water make up clouds? - ANSWER Solid (ice crystals) and
liquid (water droplets)
What is latent heat? - ANSWER The energy (heat) required to break
molecular bonds and only happens when the state changes
What is evaporation? - ANSWER Liquid droplets to water vapor
, Ex: Sweat; latent heat is needed for cooling
What is condensation? - ANSWER Water vapor to liquid droplets (occurs
when the air parcel is saturated)
Ex: Formation of cloud droplets; latent heat is released warming the air
When is an air parcel saturated? - ANSWER -When its vapor vapor pressure
exceeds its saturation vapor pressure
-When its relative humidity becomes greater than 100%
-When its temperature reaches dew point
What are the two measures of humidity? - ANSWER -Relative humidity (%)
-Dew point (in C or F)
What is relative humidity? - ANSWER The ratio of actual vapor pressure to
saturation vapor pressure (the ratio of water vapor content to water vapor
capacity).
What is vapor pressure? - ANSWER The net force per unit area exerted by
molecules of water vapor in a parcel of air
