| A | B |
|---|
| Amount of energy magma contains depends on | the amount of potential energy and pressure it is under |
| Magma that reaches yhe surface is called | lava |
| The event that brings mamga to the surface is called | an eruption |
| Two definitions for a Valcano are | An opening in earth's crust that released molten lava/Lava that cools to form a mountain |
| Magma or ______ is under great ______ inside the earth and forced into deep pockets called | molten lava/pressure/magma chambers |
| Volcanic eruptions may be "quiet' where only | lava comes out |
| Volcanic eruptions may be "explosive" where | rock particles, steam, and gas comes out. |
| Volcanic eruptions quiet or explosive determmined by what 3 things? | chemistry/temperature/pressure of magma |
| Steam of lava that flows from a vent is called a(n) | lava flow |
| Most valcanoes, like EQs occur along | plate boundries |
| Volcanic activity can actually _____ as magma moves upward to the surface | produce earthquakes |
| EQs caused by volcanic activity can______ or ______ earhts crust. | fracture/buckle |
| Volcanic activity zone surrounding the Pacific Ocean | Ring of Fire |
| Created Ring of Fire when ocean plates _______ under the continental plates | buckle |
| Longest volcanic zone along the _______ where plates move apart | Oceantic ridge systems |
| Magma moves up from _______ on the ocean floor. | rifts |
| Zone islands have formed | Mid-Atlantic ridge |
| Volcanoes formed far away from plate boundries called | hot spots |
| Example of volcanoes caused by hot spots are called | Hawiian Islands |
| Monitoring changes helped Volcanologists predict eruption of volcano | Mt Pinatubo in the Philippines in 1991 saving many lives |
| Volcano that has erupted in past century is labeled | active |
| Volcanoes that haven't erupted in hundreds of year | dormant |
| Volcanoes that haven't eruoted in thousands og years | extinct |
| Thin fluid lava forms ______ volcanoes with_____ | shield/flat shield like |
| One of the largest shield is ________ on the islands of Hawaii | Mauna Loa |
| The tops of many of shield volcanoes produce | ocean islands |
| Explosive eruptions produce ____ valcanoes made of _____,____, and ______ which build up around the vent. | cinder cone/ash, cinders, other volcanic debris |
| Cinder volcanoes have ______ slopes and ______ bases | steep/gently sloping |
