​​Name: Volcano Questions
Complete the sentence: Write in the term that best completes each statement.
1. The Hawaiian Islands are examples of volcanoes.
2. Magma that flows out onto Earth's surface is known as .
3. The opening at the top of a volcano's vent is known as a .
4. Mt. Saint Helen’s is an example of a volcano.
5. The state of volcanoes currently spewing smoke, ash, steam, cinders, and/or lava is .
6. The state of volcanoes not currently active is .
7. Area around Pacific plate where earthquakes and volcanoes are common is known as the .
8. Openings in Earth's crust that allow magma to reach the surface are .
9. Type of boundary where plates separate is referred to as .
10. Melted rock deep inside Earth is called .
11. Type of boundary where one plate slides under another plate is a .
12. A mountain formed from layers of lava and ash is called a .
13. Area in Earth hot enough to melt rock into magma and create volcanoes is the .
14. The type of magma containing a lot of silica and water vapor is .
15.​Volcanic material thrown out during eruptions includes , , and .
16.​Substances that affect the explosiveness of volcanic eruptions are , and .
17.​Steep-sided volcano found along convergent boundaries .
18.​Type of magma containing little silica is referred to as .
19.​The mineral that affects the thickness of magma is .
20. A broad volcano made of flat layers of basaltic lava is a .