Across
- 2. the rigid outer part of the earth, consisting of the crust and upper mantle.
- 4. the third layer of the Earth
- 5. the places known as hotspots or hot spots are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle.
- 7. when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create new oceanic crust.
- 9. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
- 10. the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
- 14. an area on Earth where two or more lithospheric plates collide.
- 15. A change in the Earth's magnetic field resulting in the magnetic north being aligned with the geographic south, and the magnetic south being aligned with the geographic north. Also called geomagnetic reversal.
Down
- 1. places where plates slide sideways past each other.
- 3. inner core is the innermost geologic layer of the planet Earth
- 6. an underwater mountain range, formed by plate tectonics
- 8. current in a fluid that results from convection.
- 11. a theory that explained how continents shift position on Earth's surface.
- 12. The Earth's crust is its lightest, most buoyant rock layer.
- 13. a layer inside a planetary body bounded below by a core and above by a crust.