It is formed through pyroclastic rock fragments as it builds up it makes a cinder cone. I hope that helps...
Answer: volcanic activity
Explanation: The vast majority of volcanic activity on the planet occurs along the mid-ocean ridge, and it is the place where the crust of the Earth is born. The material that erupts at spreading centers along the mid-ocean ridge is primarily basalt, the most common rock on Earth.
Answer:
D
Explanation:
smelling is not a physical change we can see that melting and cutting are physical changes