Volcanoes, Earthquakes, Continental Drift.
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each of the black spaces below before clicking
on it to display the answer.
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| Tectonics | The study of the formation of the features in earth's crust.
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| The earth's crust consist of two types, which are? | 1.Oceanin Crust2.Continental Crust
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| The earth has two layers, which are? | 1.Lithosphere2.Asthnosphere
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| Lithosphere | Is made up of the oceanic crust, continental crust, and the rigid upper mantle.
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| Lithospheric Plates | Are broken up into several individual plates, these plates ride on top of the denser asthenosphere through the process of convection.
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| Asthenosphere | A layer of solid rock that flows like putty due to the extreme pressure.
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| Due to the movement of plates there are three types of movements. Name them. | 1.Divergent Boundaries2.Convergent Boundaries3.Transform Boundaries
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| Divergent Boundaries | When two plates move away from each other. They form a rift valley.Example: Mid Atlantic Ridge.
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| Convergent Boundaries | When two plates collide.
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| Transform Boundaries | When two plates grind past each other. Example: San Andrea Fault in California
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| Earthquakes | A shaking of the earth's crust due to a release of energy.
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| Elastic Rebound Theory | As pressure builds up betwen two plates that are locked the plates will fracture at their weakest point, and spring back or rebound to their original position.
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| Fault | An area where breaks in the earth's crust are moving in different directions.
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| Major Eathquake Zones | 1.Pacific Ring Of Fire2.Mid Ocean Ridges3.Euasian Melanesian Mountain Belt
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| Siesmic Waves | 1.Primary Waves (P)2.Secondary Waves (S)3.Surface Waves (L)
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| Primary Waves (P) | Compressional waves, travel through solids, liguids, gas.
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| Secondary Waves (S) | Displace rock particles perpendicular to the path of the wave, travel through solids.
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| Surface Waves (L) | Travel over the surface of the earth. Move like ripples in a pound.
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| Earthquakes have two point locations. | 1.Focus2.Epicenter
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| The focus and epicenter of the earthquake are located by... | Trilateration
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| Volcanoes | Any place on the planet where some material from the inside of the planet makes it way to the surface.
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| Magma | Fluid, molten rock.
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| Where do must volcanoes occur? | Island Arcs near Subduction zones.
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| Lava | When magma reaches the sufrace.
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| Two types of rocks formed from lava. | 1.Felsic2.Maific
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| Felsic Rocks | Are formed from magma that is re-meltded continental crust. They are rich in feldspar and quartz. Red, brown or gray in color.
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| Maric Rocks | Are formed from macific magma which is directly from the mantle. Appear black in color.
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| Two types of lava rocks | 1.Aa2.Pahoehoe
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| Aa Lava Rocks | Form from thicker, slower moving lava.
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| Pahoehoe Lava Rocks | Forms smooth shapes, looking like rope or toothpaste.
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| Types of Volcanoes | 1.Shield Volcanoes2.Stratovolcano3.Cinder Cone
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| Shield Volcaneos | Broad and rounded, made from stacks of runny basaltic lava.
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| Statovolcano | Steep sided volcano made of alternating layers of cinders and lava.
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| Tephra | A term used to descrive any material produced in an explosive volcanic eruption.
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