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LESSON 20 VOCABULARY TERMS

LESSON 20 VOCABULARY TERMS. S HIELD VOLCANO. A WIDE BROADLY SLOPING VOLCANO THAT FORMS FROM RUNNY LAVA. IT IS THE LARGEST OF VOLCANOES. COMPOSITE VOLCANO. A VOLCANO THAT FORMS FROM ALTERNATING ERUPTIONS OF VISCOUS LAVA AND BROKEN ROCK. IT IS STEEP NEAR THE SUMMIT AND FLAT TOWARD THE BASE.

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LESSON 20 VOCABULARY TERMS

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  1. LESSON 20 VOCABULARY TERMS

  2. SHIELD VOLCANO A WIDE BROADLY SLOPING VOLCANO THAT FORMS FROM RUNNY LAVA. IT IS THE LARGEST OF VOLCANOES.

  3. COMPOSITE VOLCANO A VOLCANO THAT FORMS FROM ALTERNATING ERUPTIONS OF VISCOUS LAVA AND BROKEN ROCK. IT IS STEEP NEAR THE SUMMIT AND FLAT TOWARD THE BASE.

  4. CALDERA A LARGE, STEEP-SIDED, CIRCULAR VOLCANIC DEPRESSION THAT FORMS WHEN MAGMA RETREATS OR ERUPTS FROM A SHALLOW UNDERGROUND MAGMA CHAMBER.

  5. CRATER A SMALL, BOWL-SHAPED HOLE THAT FORMS WHEN ROCK EXPLODES FROM A VOLCANO DURING AN ERUPTION.

  6. LAVA FLOW LAVA THAT FLOWS QUICKLY OVER THE SURFACE OF THE EARTH AND COVERS A WIDE AREA.

  7. CINDERS PEBBLE-SIZED ROCK FRAGMENTS THAT HAVE THE SAME COMPOSITION AS ASH.

  8. CINDER-CONE VOLCANO A SMALL CONE-SHAPED VOLCANO MADE OF BROKEN ROCKS OR BLOBS OF HARDENED LAVA THAT ACCUMULATE AROUND THE VOLCANIC VENT.

  9. MAGMA MOLTEN ROCK BENEATH EARTH’S SURFACE.

  10. LAVA MOLTEN ROCK THAT HAS ERUPTED ONTO EARTH’S SURFACE.

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