Across
- 2. Boundaries (oceanic/oceanic) - Plates move toward each other. The denser-older oceanic plates get subducted under the newer younger oceanic crust. Island Arcs form (Japanese Islands)
- 4. - Preserved remains of animals, plants, and other organisms from the remote past
- 5. - A molten mixture of rock-forming substances, gasses, and water from the mantle
- 7. age - An approximate age of something
- 8. Crust - Earth’s crust located under the ocean
- 13. Boundaries (oceanic/continental) - Oceanic goes under the continental plate and creates a subduction and a trench which creates a volcano
- 14. Boundary - A plate boundary where two plates move away from each other.
- 16. age - The most accurate way of determining an object’s age
- 18. Spreading - Magma rises on the sea floor causing it to spread
- 21. Boundary - Boundary between tectonic plates that are sliding past each other
- 23. - Rigid layer made up of the uppermost part of the mantle and the crust
- 24. Boundaries (continental/continental) - When two continental plates collide creating mountains
- 27. of Continental Drift - Theory that the continents are drifting, or moving
- 29. Rock - Rock that is formed in layers by the deposition of weathered rock
- 30. - The breaking down of rocks and other materials on the Earth’s surface
- 32. - the layer of the Earth between the crust and the core
Down
- 1. Waves - Vibrations that travel through Earth carrying the energy released during an earthquake
- 3. Crust - Portion of the Earth’s crust that primarily contains granite, is less dense than oceanic crust, and his 20-50 km thick
- 6. - 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
- 9. - Thin and solid outermost layer of the Earth above the mantle
- 10. Core - Layer of molten iron and nickel that surrounds the inner core of the Earth
- 11. - Process by which sediment is laid down in new locations
- 12. Valley - A valley formed by the separation of tectonic plates
- 15. Currents - Heat energy transfer between two parts of a fluid of different temperatures. When hot fluids rise and cold fluids sink.
- 17. Time Scale - Chronological representation of Earth’s geologic history going back 4.6 billion years until the present day
- 19. Tectonics - Theory that great slabs or plates of Earth’s outer layer float on a hot, semi-molten mantle. All plates are moving slowly and have rafted continents to new positions over time
- 20. of Fire - A major belt of volcanoes that rims the Pacific Ocean
- 22. Fossils - Special fossils that help geologists determine the boundaries in geologic time
- 25. - The process by which wind, water, ice, or gravity transport soil and sediment from one location to another
- 26. Fossils - indirect evidence of life in the past rather than the body of the animal itself (footprints, feces, tracks)
- 28. of Superposition - States that new rock layers are formed on top of older rocker layers, unless some type of disturbance occurs.
- 31. Core - Dense sphere of solid iron and nickel at the center of Earth