7. Which of the following is not an indicator of volcanic eruption? A. Weather patterns B. Earthquake frequency C. Release of different gases from the volcano D. Swelling or changing of shapes of the volcano 8. What are the required factors for an explosive volcanic eruption? A. Thick magma C. high gas pressure B. High silica content/concentration D. All are required factors. 9. What magma type is the most vicious? A, indicate C. dacite B. basalt D. rhyolite 10. What would a nonexplosive eruption look like? A. Low gas pressure B. Fluid thin, calm magma/lava C. Nothing has blown into the air (smoke, ash, dust, and rock fragments) D. All are signs of nonexplosive eruption, 11. Which does not belong to the group? A. climatic effects C. lahar B. famine and disease D. tsunamis 12. Which is not a direct hazard of a volcano? A. Ash C. pyroclastic flow B. mudflow D. tsunamis
