Relative Dating, a method of determining whether an event or object is older or younger than other events or objects., Absolute Dating, the process of determining a specific numerical age or age range in years for rocks, fossils, or archaeological artifacts., Radioactive Dating, a scientific technique used to determine the absolute age of rocks, minerals, or organic materials by measuring the decay of radioactive isotopes., Unconformities, erosion can wash away portions of the rock record, leaving a gap where newer layers deposit over a much older, missing time period., Law of Superposition, any UNDISTURBED layers of rock will have the oldest layer on the bottom and the youngest on the top., Fault, a break in the strata, Strata, layers of rock, Index Fossil, a fossil used to find the age of the rock layers., Uniformitarianism, is the idea that the natural laws and geological processes happening today have always happened in the same way throughout Earth's history., Law of Cross Cutting Relationships, any geological feature that cuts across or disrupts another feature is younger than the rocks or structures it affects., Uplift, plate boundaries push rock upward, Folding, can flip or bend rock layers so older rocks end up on top., Igneous Intrusion, when magma enters a crack in the rock and hardens into new rock., fault, igneous intrusion, unconformities, folding, Ice Core, Act as a natural "time machine" that helps scientists study Earth's past climate.

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