What is it called when lava cools and hardens? Sometimes magma flows upward and is forced out onto the earth's surface during a volcanic eruption. Magma that reaches the surface of the earth is called lava. When it cools and hardens, it too forms igneous rock. Igneous rock that is formed on the earth's surface is described as extrusive.n:
 
        
             
        
        
        
Answer: linear or circular. include genes encoding viral proteins: capsid, envelope proteins, any polymerase not found in the host cell. viruses may have a lipid envelope.
 
        
             
        
        
        
Answer:
1. Pluto is one third water
2. Pluto was discovered on February 18 , 1930 by the Lowell Observatory
3. Pluto has five known moons
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The first organism in the food chain is the producer.
        
                    
             
        
        
        
Answer:
The amount of weight lost and the diet medication