Wet igneous rock (rock that contains volatiles) melts at a lower temperature than does the dry version of that same rock. 
1.True 
2.False 

Volatile-rich magma develops gas bubbles as it rises, and this creates even more buoyant force to move the magma upward more aggressively. 
1.True 
2.False 

Vesicles are pieces of country rock broken off by intruding magma. 
1.True 
2.False 

The deeper an igneous intrusion, the slower it cools. 
1.True 
2.False