1) relative dating a) any method of determining whether an event or object is older or younger than other events or objects b) a crack in the earth's crust, usually along a lithospheric plate boundary c) A break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time. 2) absolute dating a) any method of determining whether an event or object is older or younger than other events or objects b) a crack in the earth's crust, usually along a lithospheric plate boundary c) any method of measuring the age of an object or event in years 3) index fossil a) any method of measuring the age of an object or event in years b) a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found c) any method of determining whether an event or object is older or younger than other events or objects 4) radiometric dating a) the process of measuring the absolute age of geologic material by measuring the concentrations of radioactive isotopes and their decay products b) a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found c) any method of measuring the age of an object or event in years 5) transitional fossils a) Fossils that provide patterns of evolutionary change from the early ancestors to modern life forms. b) the process of measuring the absolute age of geologic material by measuring the concentrations of radioactive isotopes and their decay products c) a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found 6) ice core a) Fossils that provide patterns of evolutionary change from the early ancestors to modern life forms. b) A long cylinder of ice obtained from drilling through ice caps or ice sheets; used to study past climates. c) the process of measuring the absolute age of geologic material by measuring the concentrations of radioactive isotopes and their decay products 7) Igneous a) a type of rock that forms from the cooling of molten rock at or below the surface b) A long cylinder of ice obtained from drilling through ice caps or ice sheets; used to study past climates. c) Fossils that provide patterns of evolutionary change from the early ancestors to modern life forms. 8) igneous intrusion a) a type of rock that forms from the cooling of molten rock at or below the surface b) A long cylinder of ice obtained from drilling through ice caps or ice sheets; used to study past climates. c) magma cutting through formed layers of sedimentary rock that then cools and hardens 9) Metamorphic a) magma cutting through formed layers of sedimentary rock that then cools and hardens b) a type of rock that forms from the cooling of molten rock at or below the surface c) Rocks that undergo a physical change due to extreme heat and pressure 10) Sedimentary a) Rocks that undergo a physical change due to extreme heat and pressure b) magma cutting through formed layers of sedimentary rock that then cools and hardens c) rock formed when layers of sediments were pressed and cemented together

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