Across
- 4. division of time that is a subdivision of a period and is itself subdivided into ages
- 7. formed when minerals in groundwater replace materials in bones and tissue,
- 11. Ocean Ridge:is an underwater mountain range, formed by plate tectonics.
- 12. rock: is a type of rock which has been changed by extreme heat and pressure
- 15. dating: is the science of determining the relative order of past events,
- 17. process of eroding or being eroded by wind, water, or other natural agents.
- 18. time scale:is a system of chronological dating that relates geological strata
- 20. Rock:A rock that formed through the cooling and solidification of magma or lava.
- 22. major division of time that is a subdivision of an eon and is itself subdivided into periods
- 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.
- 24. the outermost layer of a planet
- 27. the geological process in which sediments, soil and rocks are added to a landform or land mass.
- 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.
- 29. in the intensity of light or other radiation as it passes through a medium or object
- 30. is the earliest 4.06 billion years of Earth's history and before the current Phanerozoic Eon.
- 32. elevation of the Earth's surface in response to natural causes
- 33. the chemical and physical processes that change the characteristics of rocks on the Earth's surface.
Down
- 1. is the name given to a horizontal row of the periodic table.
- 2. Core: is a core sample that is typically removed from an ice sheet,
- 3. fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling.
- 5. plate:is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere
- 6. dating: is a method of dating rocks and minerals using radioactive isotopes.
- 8. rock:A that has formed through the deposition and solidification of sediment, especially sediment transported by water
- 9. period: is the first geological time period of the Paleozoic Era
- 10. Fossil:a fossil that is useful for dating and correlating the strata in which it is found.
- 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
- 14. is a crack in the Earth's crust
- 16. a major division of geological time, subdivided into eras.
- 18. science that deals with the earth's physical structure and substance, its history, and the processes that act on it
- 19. molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this
- 21. of Superposition: a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers
- 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.
- 26. rigid outer part of the earth, consisting of the crust and upper mantle.
- 31. the two sub-layers of the earth's crust (lithosphere) that move, float, and sometimes fracture and whose interaction causes continental drift,
- 34. cycle:an idealized cycle of processes undergone by rocks in the earth's crust