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| Radioactive material left over from nuclear power plants. |
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| A type of volcano with violent eruptions, gassy magma. Also known as stratovolcanoes. |
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| The top outermost layer of the Earth. |
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| Layer of the Earth that is the hottest and is a solid. |
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| Supercontinent that existed about 350 million years ago. |
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| Hot, molten rock that reaches the Earth's surface. |
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| A type of volcano that is broad with gentle slopes and is low in silica which flows easily. |
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| Any physical shape found on the Earth's surface. |
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| The layer of the Earth that contains both liquid and solid. |
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| The area of the Earth contains the solid portion of the crust and the upper portion of the mantle. |
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| Theory that the continents were attached and then drifted apart. |
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| Layer of the Earth directly beneath the lithosphere that is hot and has soft rock. |
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| A type of volcano that has eruptions that throw material up into the air and onto the volcano changing the shape of its top. |
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| Large period of time involving thousands, millions or billions of years is considered. |
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| Layer of the Earth that is liquid |
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| Studies fossil to obtain evidence regarding the Earth's history. |
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| Theory that the Earth's surface is made up of plates that are constantly in motion. |
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| A volcano that can no longer can erupt is considered. |
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| A volcano that hasn't erupted in a long time. |
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Definition
| Volcano capable of erupting. |
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| Scientists that study volcanos. |
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| Hot, molten rock found inside volcanoes. |
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| Any of the world's 7 main land masses |
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