Unit 1 Vocab Choiceboard

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Across
  1. 3. tectonics The theory that Earth's outer layer is made up of plates that interact and cause different forms of movement.
  2. 5. strong lower part of the mantle between the asthenosphere and the outer core. Continental driftThe idea that all of the continents used to be one (Pangea) and they all split up.
Down
  1. 1. The thin and solid outermost layer of Earth above the mantle the surface.
  2. 2. The solid, outer layer of Earth that consists of the crust and the rigid upper part of the mantle.
  3. 4. An idea supported by evidence. Seafloor spreading The process by which new oceanic lithosphere forms when magma rises to Earth's surface at mid ocean ridges and solidifies as older seafloor moves away from the ridge. Subduction When one lithospheric plate moves beneath another. Magnetic reversal The process by which Earth's magnetic north pole and south pole switch positions and change the ways Earth's magnetic fields point. Covection current Any movement of matter that results from differences on density. vertical, circular, or cyclical. Deformation The bending, tilting, and breaking of Earth's surface. Tectonic plate A block of lithosphere that consists of the crust and the ridged other part of the mantle. Transform boundary The boundary between tectonic plates that slide past each other. Covergent boundary The boundary between tectonic plates that collide. Focus Where the first movement of an earthquake occurs. Epicenter The point on Earth's surface that is directly above the focus. Earthquake The movement or trembling of the ground caused by movement of tectonic plates.Tectonic plate boundary the edge between two or more plates. Fault The break in a body of rock along which one block moves relative to another. Elastic rebound The sudden return of elastically deformed rock to its undeformed shape. Seismic waves A wave of energy that travels through the earth and away from an earthquake in all directions.
  4. 5. The layer of rock between the Earth's crust core. Asthenosphere The soft layer of the mantle on which tectonic plates move.