Answer:
From becoming magma. It comes to the surface because of the tectonic plates shifting, it's able to escape from the cracks. it also may cause the plates to melt and allow the magma to rise.
Explanation:
deep underground, rocks are put under tons of pressure and extremely hot temperatures, causing them to melt into magma. sometimes the magma cools and becomes igneous rock. Magma makes it to the surface by either escaping through cracks in tectonic plates or by melting the plates and rising. 
 
        
             
        
        
        
Incomplete contribution happens when there is a limited supply of air so only half is much oxygen adds to the carbon forming carbon monoxide
        
             
        
        
        
Answer:
 An atomic nucleus is positively charged because it is composed of protons.
Explanation:
hope this helps you:)
 
        
                    
             
        
        
        
Answer: The addition of salt in ice particles causes a decrease on its freezing point.
Explanation: salt definitely lowers the freezing point of ice particles.
 
        
                    
             
        
        
        
When you combine protons and neutrons in the electrical charge they combine to make electricity