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K12 LibreTexts

7.13: Geological Activity and Volcanoes- Challenge 2

  • Page ID
    5437
  • 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
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