Wheres the question?That is a statment.
        
             
        
        
        
The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in. 
So an object denser than water will sink
        
                    
             
        
        
        
Answer:
Explanation:
*organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes
*In terms of this cycle, the decomposers metabolize oxygen and release carbon dioxide. The primary producers then use these nutrients to fuel photosynthesis, which provides oxygen for the consumers
*burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. 
 
        
             
        
        
        
Plants do photosynthesis to make their food and stay alive