Absolute - Type of dating that gives numeric age of object, Relative - Type of dating that puts events in order, Halflife - How long it takes for half of a radioactive element to decay (2 words), Parent - The radioactive version of an element that decays, Daughter - Parent material becomes this; it is stable, Nucleus - A radioactive element has too many parts in its ___________ which makes it unstable, Anticline - Top of a fold in a rock layer, Syncline - Bottom fold of a rock layer, Fault - A break in rock layers that causes some of them to move up or down, Tilt - When rock layers are on an angle, Erode - When rock layers are worn away by water or wind, Deposit - When a rock layer is created, Intrusion - Magma that cuts through rock layers, Superposition - Law that states younger rocks are found on top of older ones, Petrification - When organic material is replaced with minerals, MoldandCast - Two part fossil (3 words), Imprint - A fossil formed when something leaves an impression in soft sediment, Trace - Type of fossil that tellls us about an organism but not what it looks like, Index - Type of fossil of an organism that lived on Earth a short period of time; helps to date layers, Amber - Substance that causes the entire preservation of an organism, Bones - This body part is more likely to be preserved than skin or organs, Sedimentary - Type of rock that most fossils form in., Decay - When a nucleus loses subatomic particles to become stable.,

Geology Test 2 vocabulary review

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