Answer:
nitrogen gas and oxygen gas.
Explanation:
78% of earths atmosphere is made up of nitrogen and 21% is made up of oxygen. 
 
        
             
        
        
        
Answer:
5480 mph
Explanation:
cuz trains went 160mph then if u add that up its correct
 
        
                    
             
        
        
        
Answer:
Generally they are divided into the following categories: small towns-up to 10,000 inhabitants, 10,000-20,000, and 20,000-50,000; medium-size cities, 50,000–100,000 inhabitants; and large cities- 100,000-300,000 and 300,000-1,000,000 inhabitants.
#ImaFilipino
#ProudToBeFilipino
 
        
             
        
        
        
Human Geography is the answer to the study of people