Rocks that are formed by hot molten rock (magma). - Igneous Rock, A type of rock which has been changed by extreme heat and pressure. - Metamorphic Rock, A continuous process by which rocks are created. - Rock Cycle, The accumulation of sand and dirt that settles in the bottom of lakes. - Sedimentation, They physical layer of Earth that is made up of two parts. - Compositional Layers, The upper layer of the earth's mantle. - Asthenosphere , The layer of igneous, sedimentary, and metamorphic rocks that forms the continents. - Continental Crust, The outer layer of Earth. - Crust, The Earth's innermost part. - Inner Core, The rigid outer part of the earth, consisting of the crust and the upper mantle. - Lithosphere, The Earth's innermost part. - Mantle, The rigid outer part of the earth, consisting of the crust and the upper mantle. - Mechanical Layers, A thin layer of rock that separates the Earth's oceans from the hot mantle beneath them. - Oceanic Crust, The hot liquid material found near the center of the Earth. - Outer Core, A major tectonic plate straddling the equator as well as the prime meridian - African Plate, Plates that move away from each other and form new crust from magma that rises to the Earth's surface. - Boundary, Is the layer of granitic, sedimentary, and metamorphic rocks which form the continents. - Continental Crust, A tectonic boundary where two plates are moving toward each other. - Convergent Boundary, A tectonic plate which includes most of the continent of Eurasia. - Eurasian Plate, A tectonic boundary where two plates are moving away from each other. - Divergent Boundary, A major tectonic plate that includes the continent of Australia and surrounding ocean (Indian subcontinent and adjacent waters). - Indo-Australian Plate, A major tectonic division of the Earth's crust, comprising Greenland and the continent of North America. - North American Plate, An underwater mountain range, formed by plate tectonics. - Mid-Ocean Ridge, Areas found under the sea. - Ocean Basin, A thin layer of rock that separates the Earth's oceans from the hot mantle beneath them. - Oceanic Crust, The features and movement of Earth's surface in the present and past. - Plate, An oceanic tectonic plate that lies beneath the Pacific Ocean. - Pacific Plate, A theory in geology that lithosphere of the Earth is divided into a small number of plates. - Plate Tectonics, The formation of new areas of oceanic crust (created as molten material). - Sea Floor Spreading, The sideways and downward movement of the edge of a plate of the Earth's crust into the mantle. - Subduction, A major tectonic plate which includes South America and a sizable region of the Atlantic Ocean. - South American Plate, Places where plates slide sideways past each other. - Transform Boundary, The uppermost part of the mantle, part of the Lithosphere. - Upper Mantle, Places where plates slide sideways past each other. - Lower Mantle, The center of the Earth. - Core, A group of parts that work together as a whole. - System, The hypothesis that continents move slowly around on Earth's surface. - Continental Drift, The name of the single landmass that broke apart 200 million years ago.  - Pangea, Small fragments. - Particle,

Structure of Earth

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