Earth History Science Crossword Puzzle!!

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Across
  1. 4. division of time that is a subdivision of a period and is itself subdivided into ages
  2. 7. formed when minerals in groundwater replace materials in bones and tissue,
  3. 11. Ocean Ridge:is an underwater mountain range, formed by plate tectonics.
  4. 12. rock: is a type of rock which has been changed by extreme heat and pressure
  5. 15. dating: is the science of determining the relative order of past events,
  6. 17. process of eroding or being eroded by wind, water, or other natural agents.
  7. 18. time scale:is a system of chronological dating that relates geological strata
  8. 20. Rock:A rock that formed through the cooling and solidification of magma or lava.
  9. 22. major division of time that is a subdivision of an eon and is itself subdivided into periods
  10. 23. Spreading: the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.
  11. 24. the outermost layer of a planet
  12. 27. the geological process in which sediments, soil and rocks are added to a landform or land mass.
  13. 28. dating:provides a numerical age or range in contrast with relative dating which places events in order without any measure of the age between events.
  14. 29. in the intensity of light or other radiation as it passes through a medium or object
  15. 30. is the earliest 4.06 billion years of Earth's history and before the current Phanerozoic Eon.
  16. 32. elevation of the Earth's surface in response to natural causes
  17. 33. the chemical and physical processes that change the characteristics of rocks on the Earth's surface.
Down
  1. 1. is the name given to a horizontal row of the periodic table.
  2. 2. Core: is a core sample that is typically removed from an ice sheet,
  3. 3. fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling.
  4. 5. plate:is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere
  5. 6. dating: is a method of dating rocks and minerals using radioactive isotopes.
  6. 8. rock:A that has formed through the deposition and solidification of sediment, especially sediment transported by water
  7. 9. period: is the first geological time period of the Paleozoic Era
  8. 10. Fossil:a fossil that is useful for dating and correlating the strata in which it is found.
  9. 13. any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water or other liquid
  10. 14. is a crack in the Earth's crust
  11. 16. a major division of geological time, subdivided into eras.
  12. 18. science that deals with the earth's physical structure and substance, its history, and the processes that act on it
  13. 19. molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this
  14. 21. of Superposition: a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers
  15. 25. mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
  16. 26. rigid outer part of the earth, consisting of the crust and upper mantle.
  17. 31. the two sub-layers of the earth's crust (lithosphere) that move, float, and sometimes fracture and whose interaction causes continental drift,
  18. 34. cycle:an idealized cycle of processes undergone by rocks in the earth's crust