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Planet Earth Vocab

QuestionAnswer
What is continental drift? The hypothesis the continents slowly move across Earth's surface.
What is deposition? The process by which sediment settles out of the water or wind that is carrying it.
What is an earthquake? The shaking that results from the movement of the rock beneath Earth's surface.
What is erosion? The destructive process in which water or wind loosen and carry away fragments of rock.
What is a fault? A break in Earth's crust where slabs of rock slip past each other.
What is a fossil? A trace of an ancient organism that has been preserved in rock.
What is geology? The study of planet Earth.
What is igneous rock? A type of rock that forms from the cooling of moltenrock at or below the surface.
What is lava? Liquid magma that reaches the surface;also the rock formed when liquid lava hardens.
What is magma? The molten mixture of rock-forming subsatances, gases, and water from the mantle.
What is metamorphic rock? A type of rock that forms from an existing rock that is changed by heat, preassure or chemical reactions.
What is a mineral? A naturally-occurring inorganic solid that has a crystal structure and a definite chemical.
What is Pangaea? The name of the single landmass tha broke apart 200 million years ago and gave rise to today's continents.
What are plate tectonics? The theory that pieces of the Earth's lithospere are in constant motion,driven by convection currents in the mantle.
What is a Richter scale? A scale that rates seismic waves as measured by a particular type of mechanical seismograph.
What is sedimentary rock? A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together.
What is a volcano? A weak spot in the crust where magma has come to the surface.
What is a glacier? An extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains.
What is the hydrosphere The water on or surrounding the surface of the globe, including the water of the oceans and the water in the atmosphere.
What is humus? The dark organic material in soils, produced by the decomposition of vegetable or animal matter and essential to the fertility of the earth.
What is the lithosphere? A ridgid layer made up of the uppermost part of the mantle and the crust.
What is permeable? allowing especially liquids to pass or diffuse through
What is soil? The portion of the Earth's surface consisting of disintegrated rock and humus.
What is weathering? The various mechanical and chemical processes that cause exposed rock to decompose.
Created by: blinggirl98526
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