Terms and questions
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| show | A theory that the continents have not always been in there present locations but have moved there over millions of years.
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| show | Mesosaurus, cynogathus, lystrosourus, glossopteris
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| show | The "super continent," when the continents were one.
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| Wagner proposed his theory based on(3): | show 🗑
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| show | The large slabs of rocks that form Earth's surface, moving over a layer of partly molten rock
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| show | An opening in Earth's surface that when actives spews out gases, chucks of rocks and melted rock.
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| Earthquakes | show 🗑
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| Mid-Atlantic Ridge | show 🗑
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| show | A person who studies the ocean floor
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| show | The process in which Earth magnetic field, over thousands of years, completely reverses its direction
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| Palemagnetism | show 🗑
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| show | A pattern of alternating stripes of different directions of magnetic polarity in rock on the sea floor.
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| show | Molten rock beneath Earth's surface
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| show | The region where magma breaks through the Earth's surface, continually forcing apart old rocks and forming a new sea floor
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| show | a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
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| Hot Spot | show 🗑
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| Plate Tectonic Theory | show 🗑
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| show | The layer of Earth made up of the crust and mantle, and ranging thickness of 65km to 100km
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| show | Earth's outermost layer formed by lighter materials, such as silicon and oxygen, floating on the top during Earths cooling period.
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| show | Continental Crust- Made of granite, 70km thick
Oceanic Crust- made from a dense and dark rock called basalt, 10km thick
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| Mantle | show 🗑
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| Mantle's thickness and composition | show 🗑
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| show | The layer below Earth's mantle
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| Outer Core's thickness and composition | show 🗑
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| show | Earth's solid center
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| Inner Cores's thickness and composition | show 🗑
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| Asthenosphere | show 🗑
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| Mantle Convection | show 🗑
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| Rift Valley | show 🗑
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| Ridge push | show 🗑
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| show | When one plate goes under another
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| Subduction zones | show 🗑
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| show | The pulling of a tectonic plate as its edge subducts deep into the mantle
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| show | The region where two tectonic plates are in contact
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| Divergent plate boundaries | show 🗑
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| Divergent plates | show 🗑
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| Convergent plate boundary | show 🗑
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| Converging plates | show 🗑
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| show | When an oceanic plate and continental plate collide and the oceanic plate is forced beneath the continental plate, this creates a deep underwater valley called Trench.
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| show | A deep underwater valley
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| Volcanic belt | show 🗑
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| show | When two oceanic plates collide and subdiction occurs. cooling will causes one plate to be denser than the other and the denser plate will slide another
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| volcanic Island Arc | show 🗑
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| Continental- continental plate convergence | show 🗑
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| show | Large breaks in rock layers
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| Transform Fault | show 🗑
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| Focus(foci) | show 🗑
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| show | the point on earths surface directly above the focus where an earthquake starts
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| Seismic waves | show 🗑
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| show | the study of earthquakes and seismic waves
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| show | Waves that ripple along Earth's surface
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| show | travels along earths surface and is last to arrive (slowest)
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| show | a type of seismic body (underground) wave that travels at about 6km/s through earths crust
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| show | travels through solid, liquid and gas and is first to arrive (fastest)
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| show | a type of seismic body (underground) wave that travels at about 3.5km/s causing the ground to move in perpendicular to the direction of the waves motion
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| show | travels through solids but not liquids and is second to arrive (slower)
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| show | devices that measure the amount of ground motion caused by an earthquake and recorded on a seismo grah
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| show | a record of ground motion
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| show | Magnitude is a measure of the amount of energy released during an earthquake
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| show | cone shaped volcanoes: the cone shapes is the result or repeated eruptions
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| show | volcanoes that form over hot spots: the largest volcanoes on earth
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| show | volcanoes that occur where magma erupts through long cracks in the lithosphere where tectonic plates are spreading apart
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