Air does have weight. 14.7 psi in fact. Most of the air is Nitrogen gas, which is 2 atoms of nitrogen. There is also Oxygen gas (O2). Finally there is Carbon Dioxide (CO2). There is also a small percentage of other gasses, but they are insignificant.
        
                    
             
        
        
        
The Earth spinning on its axis is what causes day and night. when the Earths surface has direct sunlight from the sun it is day time. When the Earths surface is away from the sun it gets indirect sunlight causing it to be night time. may I have the brainliest ?!!
        
                    
             
        
        
        
A fungus that makes blue cheese. 
Explanation: 
Rusts and smuts belong to Basidiomycetes.
        
                    
             
        
        
        
True they are in the heart as well as the rest of your body