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25 Cards in this Set
- Front
- Back
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Geology
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Form of Earth science which studies rocks, the layers of the Earth, plate tectonics, etc.
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Crust
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Thin, solid, least dense, outer layer of the Earth.
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Mantle
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Middle layer of the Earth that is hot and can be solid or liquid-like.
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Core
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Hottest, most dense potion of the Earth. Portions are solid and portions are liquid.
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Lithosphere
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Solid and brittle, outer part of the Earth made up of the crust and upper portion of the mantle.
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Asthenosphere
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2nd layer of the Earth that is made out of mantle rock that is puttylike.
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Mesosphere
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3rd layer of the Earth that is made out of mantle rock that is hot, strong and solid.
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Continental drift
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Theory that over time the continents have moved to reach their current locations and continue to move.
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Plate tectonics
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The Earth's surface is broken up into sections that move constantly.
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Seafloor spreading
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How plate tectonics occurs, portions of the crust move apart and new crust constantly being made.
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Subduction
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When more dense sections of the crust sink under the less dense portions.
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Midocean ridge
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Location where seafloor spreading occurs.
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Convergent boundary
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Where two plates collide.
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Divergent boundary
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Where two plates spread apart.
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Transform boundary
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Where two plates slide past each other usually not smoothly.
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Magma
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Molten rock below the Earth's surface.
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Lava
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Molten rock on the Earth's surface that is starting to cool and harden.
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Pyroclastic material
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Solid material created in an eruption.
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Lapilli
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Small chunks of magma that have hardened during the eruption and are blown away from the source.
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Tuff
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Rock formed when volcanic ash is compressed over long periods of time.
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Aa
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Type of lava that is sharp and jagged.
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Pahoehoe
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Type of lava that is rope-like and smooth on the surface.
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Hot spot
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A way that volcanoes form. Created by a mantle plume and usually located away from a plate boundary.
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Viscosity
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The tendency of a liquid to pour or flow.
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Lahar
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A mudslide created by the mixture of pyroclastic material and water created in an eruption.
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