A) It has a single, steep-sided peak. \( \begin{array}{ll}\text { (B) It is formed from alternating layers of lava flows and pyroclastic materials. } \\ \text { C) It is the smallest type of volcano. } \\ \text { D) is primarily composed of basaltic lava. }\end{array} \) 7. Which type of volcano is typically the smallest and is formed from the accumulation of tephra, ash, and volcanic rocks? \( \begin{array}{lll}\text { A) Shield Volcano } & \text { B) Composite Volcano } & \text { Cinder Cone Volcano D) Lava Dome } \\ \text { 8. Lava domes are formed by which type of lava? } \\ \begin{array}{ll}\text { A) Low-viscosity basaltic lava } \\ \text { B) High-viscosity andesitic or rhyolitic lava } \\ \text { C) Pyroclastic flows } \\ \text { D) Alternating layers of lava and ash }\end{array} \\ \text { 9. Which type of volcano is most likely to produce explosive eruptions due to the high } \\ \text { viscosity of its magma? } \\ \text { A) Shield Volcano } & \text { (B) Composite Volcano C) Cinder Cone Volcano D) Lava Dome }\end{array} \)

Let's analyze the questions step by step based on the characteristics of different types of volcanoes. ### Question 7 **Which type of volcano is typically the smallest and is formed from the accumulation of tephra, ash, and volcanic rocks?** - **A) Shield Volcano**: These are large, broad, and formed from low-viscosity lava flows, not typically the smallest. - **B) Composite Volcano**: These are larger and formed from alternating layers of lava and ash, not the smallest. - **C) Cinder Cone Volcano**: These are indeed the smallest type of volcano, formed from the accumulation of tephra, ash, and volcanic rocks. - **D) Lava Dome**: These are formed from the slow extrusion of high-viscosity lava, not the smallest. **Answer: C) Cinder Cone Volcano** ### Question 8 **Lava domes are formed by which type of lava?** - **A) Low-viscosity basaltic lava**: This type of lava flows easily and forms shield volcanoes, not lava domes. - **B) High-viscosity andesitic or rhyolitic lava**: This type of lava is thick and tends to pile up near the vent, forming lava domes. - **C) Pyroclastic flows**: These are fast-moving currents of hot gas and volcanic matter, not the type of lava that forms domes. - **D) Alternating layers of lava and ash**: This describes composite volcanoes, not lava domes. **Answer: B) High-viscosity andesitic or rhyolitic lava** ### Question 9 **Which type of volcano is most likely to produce explosive eruptions due to the high viscosity of its magma?** - **A) Shield Volcano**: These produce non-explosive eruptions due to low-viscosity lava. - **B) Composite Volcano**: These are known for explosive eruptions because they are formed from high-viscosity magma. - **C) Cinder Cone Volcano**: These can be explosive but are generally less so than composite volcanoes. - **D) Lava Dome**: These can also produce explosive eruptions, but composite volcanoes are more commonly associated with explosive activity. **Answer: B) Composite Volcano** ### Summary of Answers 1. **Question 7**: C) Cinder Cone Volcano 2. **Question 8**: B) High-viscosity andesitic or rhyolitic lava 3. **Question 9**: B) Composite Volcano