- The opening in Earth's surface through which a volcanic eruption takes place.
- ______% of the world's earthquakes and _____% of the world's largest earthquakes occur along the Ring of Fire.
- calm oozing of magma out of the ground produces lava flows; A volcanic eruption characterized by the outpouring of lava.
- • Broad and gently sloping.• Composed of solidified basaltic lava flows.• Flows often contain lava tubesBroad, gently sloping cone constructed of solidified lava flows
- .... eruptions are passive, not explosive
- low viscosity and flows easily• Pahoehoe, A'a, Lava Tube
- Large spindle- or lens-shaped pyroclast.
- Fine pyroclasts (less than 4 millimeters)
- Pyroclast approximately the size of a sand grain. Sometimes defined as between 4 and 32 millimeters in diameter.
- A lava flow that solidifies with a spiny, rubbly surface.
- produced by condensation of volcanic water vapor.
- Volcanic activity, including the eruption of lava and rock fragments and gas explosions; occurs when magma makes its way to the Earth's surface
- size ranges from dust (ash) to boulders (blocks and volcanic bombs)
- A volcanic eruption characterized by the violent ejection of pyroclastic material.
- both positively and negatively influenced by volcanism.
- An index used to measure, on a scale of 1-10, the power of a volcanic eruption.
- produced when magma reaches Earth's surface
- Turbulent mixture of pyroclastics and gases flowing down the flank of a volcano.
- Large amounts of ash and volcanic gases in atmosphere can trigger rapid ..... and contribute to .......
- The ring of fire has ___________ volcanoes and is home to over ____% of the world's active and dormant volcanoes.