Cold air is drier because the water molecules are more likely to condense to a liquid. 
This was the answer on my course, hope it helps!
 
        
             
        
        
        
Answer:
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
Explanation:
 
        
             
        
        
        
The answer is the second choice
        
             
        
        
        
Answer:
A surface wave is a wave that moves along the interface of two different materials, like air and water.
Explanation: