Volcanoes Review

Please select the word that best fits each sentence. 1. Viscosity means “resistance to flow.”2. Volcanoes that have not erupted in recorded history and probably never will erupt again are called extinct volcanoes.3. Dormant volcanoes are currently not erupting, but the record of past eruptions suggests that they may erupt again4. Volcanoes that are currently erupting or show signs of erupting in the near future are called active volcanoes.5. The most common type of volcano that has very explosive eruptions of pyroclastic material followed by calm lava flows is a composite volcano.6. Cinder conevolcanoes tend to be smaller and can form quickly. They have a dome on top and form from moderately explosive eruptions of pyroclastic material.7. Shield volcanoes have gently sloping sides and can be enormous. They are formed from non-explosive eruptions with gentle lava flows8. Hot, molten rock found inside the earth’s crust: magma9. Hot, molten rock that flows from a volcano (outside the earth’s crust): lava10. A hot spot is a volcanically active place that is far away from a plate boundary.11. The viscosity of the lava and the amount of dissolved gases can determine how a volcano will erupt. Volcano Parts Using the word bank, fill in the parts of a volcano. One part doesn't have a number; just click on the dot. Make sure to spell each word correctly or it will be marked as incorrect.magma chamber pyroclastics lava flow crater main vent side vent volcano pyroclastics crater side vent lava flow magma chamber main vent volcano Sort the descriptions to the volcano they describe. Composite or Stratovolcano tall, well-shaped cone can erupt explosively, followed by gentle lava flows made of both high and low viscosity lava most of the world's active volcanoes Cinder Cone made of high viscosity lava steep, cone-shaped hill or mountain erupts explosively Shield Volcano Broad, gentle slope made of low viscosity lava tends to have quiet eruptions Hot Spot A volcano that is found in the middle of a tectonic plate volcano becomes extinct when it moves off of it