Answer
A thin atmosphere does not supply much oxygen, and the heat from the sun would evaporate it, because mercury is close to the sun.
 
        
             
        
        
        
Sup Milk,
Sublimation = Energy is absorbed and a solid turns to a gas.
Condensation = Energy is released and a gas changes to a liquid.
Evaporation = Energy is absorbed into a liquid to turn it into a gas.
 
        
                    
             
        
        
        
The electric field is given by volts/distance: 

.  The breakdown voltage of dry air is about 3x10^6V/m.  So solving for V we get

or 
 
 
        
        
        
Surveys are considered the most reliable way to gather data
        
             
        
        
        
A descriptive observation may very well be a mixture of both quantitative and qualitative as it can utilize elements of both types. Qualitative deals with the kinds of observations that cannot be measured in numerical form. Quantitative data is just that.