7.13: Geological Activity and Volcanoes- Challenge 2
- Page ID
- 5437
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- 1. Shield volcanoes are made from ___.
- low viscosity lavas
- 2. Felsic lavas are ___ and don't travel as far from the volcanic vent as mafic lavas, resulting in steeper cones.
- viscous
- 3. Cinder cones have a cone shape, because ___.
- rock fragments shoot up in the air and fall back to the ground
- 4. A ___ is a circular-shaped hole into which a volcano (or supervolcano) may collapse during an explosive eruption.
- caldera
- 5. The largest supervolcano in North America is ___.
- Yellowstone
- 6. A ___ forms when a large amount of fluid lava spreads out and cools into a broad, flat surface.
- lava plateau
- 7. Shiprock in New Mexico is an example of a ___.
- volcanic neck
- 8. A ___ is a round mound of thick lava that cools near the mouth of a volcano.
- lava dome
- 9. Half of the world's geysers are found ___.
- in the U.S.
- 10. A ___ forms when superheated groundwater becomes trapped, building pressure until the water breaks through the seal of Earth's crust.
- geyser
- 11. At least two of the hot spring areas in the continental U.S. are ___.
- above supervolcanoes