Term
| What are igneous rocks comprised of? |
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Definition
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Term
| The principal difference between mafic and silicic rocks. |
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Definition
| Mafic rocks are rich in Fe and Mg while silicic rocks are always less dense than mafic rocks. |
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Term
| Theory of plate tectonics |
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Definition
| Theory that the outer layer of the Earth consists of separate plates that move with respect to one another. |
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Term
| List some topics of evidence regarding continental drift. |
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Definition
| Climatic belts, common fossils, matching rocks units, common geological features. |
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Term
| The youngest oceanic crust lies at___, The oldest oceanic crust lies at ____ |
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Definition
| Mid-ocean ridge, the coasts of continents |
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Term
| What type of boundaries occur between earth plates? |
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Definition
| Divergent, Convergent, and Transform boundaries |
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Term
| What process is occurring when two continental plates converge to form mountain ranges because crust is very buoyant? |
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Definition
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Term
| When does a hotspot occur? |
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Definition
| When mantle plumes rise and form a volcano in a stationary position. |
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Term
| Continental margins that do not follow plate boundaries are commonly referred to as ____. |
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Definition
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Term
| Name the order of lithosphere layers from bottom to top.. |
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Definition
| Lithosphere mantle, Gabbro, Dikes, Pillow Basalt, Sediment |
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Term
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Definition
| When magma cools below the sea floor. |
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Term
| Where are pillow basalts formed? |
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Definition
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Term
| All subducted crust is ____ in origin |
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Definition
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Term
| Where is it that there is a cluster of earthquake activity at a convergent boundaries? |
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Definition
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Term
| When sediment piles up in trenches what will it form? |
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Definition
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Term
| What type of triple junctions can occur? |
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Definition
| Ridge-ridge-ridge and trench-transform-transform |
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Term
| Continental hotspots form ____. |
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Definition
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Term
| What is created from substances that are converted to gas from either solid or liquid states? |
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Definition
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Term
| What kind of rock does paleomagnetisn occur in and why? |
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Definition
| Igneous rocks because when rocks are in the lava stage heat cause the dipoles of micro particles to move randomly so as the rock cools, the magnetic particles will align themselves to the poles and remain fixed. |
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Term
| Where are seamounts generally found? |
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Definition
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Term
| An ocean-ocean divergence is known as a(n) _______. |
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Definition
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Term
| There is strong magnetization when dipole moments ______. |
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Definition
| Are oriented in 1 direction. |
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Term
| What does the magnetic field do? |
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Definition
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Term
| What is a Van Allen radiation belt? |
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Definition
| A strong field that traps in harmful radiation. |
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Term
| Name the 3 types of gases that the atmosphere is comprised of: |
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Definition
| 78% N, 21% O, and 1% minor gases |
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Term
| Name 3 partitions of the atmosphere: |
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Definition
| Troposphere, Stratosphere, Mesosphere |
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Term
| What is the most common mineral on Earth? |
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Definition
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Term
| Name the 4 categories of Earth minerals |
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Definition
| Organics, Minerals, Glass, Silica |
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Term
| What are inorganic compounds that are arranged in an orderly fashion called? |
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Definition
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Term
| Which type of magma is the most viscous? Felsic magma or Mafic magma |
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Definition
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Term
| What are blob-shaped intrusions of igneous rock called? |
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Definition
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Term
| What is the boundary between the crust and mantle called? |
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Definition
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Term
| Study of ancient magnetic particles preserved in rock. |
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Definition
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Term
| What is the continental crust comprised of? |
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Definition
| Silicates, silicic intermediates, and some mafic rocks |
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Term
| What is the oceanic crust composed of? |
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Definition
Ultra mafic rocks, Mafic rocks, and Igneous Rocks |
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Term
What creates the earth's magnetic field? |
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Definition
| The outer core spinning around the inner core. |
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