Answer:
sea water contains a salt
 
        
                    
             
        
        
        
Explanation is in the file
tinyurl.com/wpazsebu
 
        
             
        
        
        
Answer:
There are two main factors that make ocean water more or less dense than about 1027 kg/m3: the temperature of the water and the salinity of the water. Ocean water gets more dense as temperature goes down. So, the colder the water, the more dense it is. Increasing salinity also increases the density of sea water.
 
        
             
        
        
        
Explanation:
On your own notebook paper write a four sentence summary of the most important ideas on each section 
what is Environmental science 
How do we study Environmental science