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| ______ are when bits of rock or solidified lava dropped from the air during an explosive volcanic eruption. |
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| ______ occur because of gases under high pressure. |
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| ______ is an intrusive igneous rock body formed when magma is squeezed into a vertical crack that cuts across rock layers and hardens. |
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| ______ is formed by alternating layers of tephra and lava that that is found mostly where Earth's plates come together. |
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| ______ is a compound of silicon and oxygen. |
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| ______ is the amount of trapped water vapor or silica. |
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| ______ is broad with gently sloping sides formed when hot, fluid lava flows from one or more vents. |
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| ______ is steep-sided and made of loosely packed tephra. |
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| _______ is the largest intrusive igneous rock bodies that form when magma cools underground before reaching Earth's surface. |
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| ______ is an intrusive igneous rock body that forms when magma is sqeezed into a horizontal crack between rock layers and then hardens. |
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| ______ is the solid, igneous core of a volcano left behind when the volcano stops erupting and the softer cone erodes away. |
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| ______ is the large opening formed when the top of a volcano collapses. |
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______ is an opening in Earth's surface that often forms a mountain when layers of lava and volcanic ash erupt and build up.
______ occurs where Earth's plates are moving apart or together and at hot spots. |
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| ______ is the location in the mantle that is hotter than oter areas and that melts rock, which is forced up toward the crust as magma. |
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| ______ is a steep-walled depression around a volcano's vent. |
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| ______ is an opening on Earth's surface where magma is forced up and flows out as lava. |
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