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| A volcanic eruption can postitively affect the environment by. |
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| A broad (wide) volcano with gently sloping sides best describes which kind of volcano? |
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| The 1980 eruption of Mt. St. Helens in Washington, covered the city of Spokan with tons of ash. Its eruption would most likely be described as what? |
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| explosive, producing pyroclastic material |
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| When does magma become lava? |
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| Wehn it reaches the magma chamber. |
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| Volcanic island arcs are found where which two kinds of plates collide? |
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| Pahoehoe is a type of lava you would see in what kind of eruption? |
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| A ______ forms when a magma chamber that supplies material to a volcano empties and its roof collapses, causing the ground to sink and leaving a large circular depression. |
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| Magma with low amounts of silica and dissovled gasses lead to what kind of erruptions? |
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| Magma forms at a convergent boundary when an oceanic plate moves in which direction? |
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| What theory helps explain the causes of both earthquakes and volcanos? |
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| As the temperature of magma increases, its viscosity will? |
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| What type of volcanos are built out of layers of lava from repeated non-explosive eruptions? |
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| A hot spot is responsible for creating what group of islands? |
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| The last major eruption of Mt. Hood occured in the 1790's. Many scientists believe it is due for another major eruption sometime in the future. This volcano would be considered? |
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| The place where two tectonic plates collide is called what? |
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| The Ring of fire roughly outlines what major tectonic plate? |
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| Nearly 90% of Earth's active volcanoes are located along the Ring of Fire. What responsible for all of these volcanoes in this location? |
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| Subduction zones outlining the Pacific Ocean |
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| What rock type is created from the cooling and hardening of magma and lava? |
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Where there is magma what kind of energy is possible?
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| As repeated eruptions of lava pour out of cracks in Earth's crust, it can build up an elevated flat area of land. What would this represent? |
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| Devil's Tower in Wyoming is thought to be the inside of the remnants (pipe) of a volcano that once exsited. This landform today would be classified as what? |
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| Mt. Kilauea in Hawaii has been erupting lava continuously since the year 1983. This volcano is classified as a... |
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