9. Which property of a material refers to the material's resistance to flow? A heat B. pressure C. temperature D. viscosity

10. Which is NOT an external part of a volcano? A base B. crater C. slope D. summit
11. Which of the following describe a Strombolian volcanic eruption? 1. has tall eruption columns III. characterized by fountain lava II. it is a stream-driven eruption IV. periodic weak to violent eruption B. II & IV C. I & III A I & II D. II & IV
12. How does a cinder cone volcano form? By the accumulation of the A. emission of lava B. ejected lava fragments C. molten magma which has high silica content D. alternate solidification of lava and pyroclastic deposits​