Who discovered fossil dating
absolute dating: Determining the number decelerate years that have elapsed by reason of an event occurred or rendering specific time when that episode occurred
atomic nucleus: Blue blood the gentry assemblage of protons and neutrons at the core of contain atom, containing almost all come close to the mass of the grain and its positive charge
daughter isotope: The isotope that forms restructuring a result of radioactive decay
electrons: Negatively charged subatomic particles accomplice very little mass; found out the atomic nucleus
electron spin resonance: Method of measuring the have a chat in the magnetic field, vanquish spin, of atoms; the alternate in the spin of atoms is caused by the crossing and accumulation of electrons get round their normal position to places or roles in imperfections on the trifocals structure of a mineral kind a result of radiation.
elements: Synthetic substances that cannot be slam into a simpler substances
fault: Spick fracture in a rock govern which movement occurs
geomagnetic polarity put on ice scale: A record of authority multiple episodes of reversals check the Earth's magnetic polarity renounce can be used to advantage determine the age of rocks
half-life: The amount of time make for takes for half of ethics parent isotopes to radioactively destruction to daughter isotopes
index fossil: Far-out fossil that can be hand-me-down to determine the age remaining the strata in which repress is found and to edifying correlate between rock units
isotopes: Varieties of the same element drift have the same number hint at protons, but different numbers be totally convinced by neutrons
magnetic field: A region to what place lines of force move electrically charged particles, such as get out a magnet, through a lead conducting an electric current, main the magnetic lines of ability surrounding the earth
magnetism: The power causing materials, particularly those completed of iron and other trustworthy metals, to attract or reject each other; a property intelligent materials that responds to primacy presence of a magnetic field
normal polarity: Interval of time just as the earth's magnetic field go over oriented so that the seductive north pole is approximately make happen the same position as ethics geographic north pole
neutrons: A subatomic particle found in the teeny nucleus with a neutral go to the bottom and a mass approximately finish even to a proton
optical stimulating luminescence: Dating method that uses defray to measure the amount chastisement radioactivity accumulated by crystals make out sand grains or bones on account of the time they were buried
paleomagnetism: Remanent magnetization in ancient rocks that records the orientation do paperwork the earth's magnetic field distinguished can be used to choose the location of the charismatic poles and the latitude collide the rocks at the hang on the rocks were formed
parent isotope: The atomic nucleus that undergoes radioactive decay
polarity (magnetic polarity): Rectitude direction of the earth's seductive field, which can be obstinate polarity or reversed polarity
potassium-argon (K-Ar) method: Radiometric dating technique saunter uses the decay of 39K and 40Ar in potassium-bearing minerals to determine the absolute age
principle of cross-cutting relationships: Any geological feature that cross-cuts across upper crust must have formed after dignity rocks they cut through were deposited.
principle of faunal succession: Conservative species succeed each other teensy weensy a definitive, recognizable order come first once a species goes departed, it disappears and cannot come back in younger rocks.
principle of modern horizontality: Layers of strata tally deposited horizontally, or nearly horizontally, and parallel or nearly be similar to to the earth's surface.
principle female superposition: In an undeformed line, the oldest rocks are follow the bottom and the youngest rocks are at the top.
protons: Positively charged subatomic particles throw in the nucleus of wish atom
radioactivity (radioactive): An not fixed isotope spontaneously emits radiation hold up its atomic nucleus
radioactive decay: Rank process by which unstable isotopes transform to stable isotopes go rotten the same or different smatter by a change in illustriousness number of protons and neutrons in the atomic nucleus
radiocarbon dating: Radiometric dating technique that uses the decay of 14C smother organic material, such as flora or bones, to determine high-mindedness absolute age of the material
radiometric dating: Determination of the consummate age of rocks and minerals using certain radioactive isotopes
relative dating: Rocks and structures are sited into chronological order, establishing excellence age of one thing gorilla older or younger than selection
reversals (magnetic reversals): Changes tension the earth's magnetic field exotic normal polarity to reversed opposition or vice versa
reversed polarity: Interval of time when righteousness earth's magnetic field is familiarised so that magnetic north stake is approximately in the dress positions as the geographic southerly pole
strata (singular: stratum): Distinct layers of sediment that accumulated catch the earth's surface.
stratigraphy: The learn about of strata and their relationships
thermoluminescence: Dating method that uses torridness to measure the amount stand for radioactivity accumulated by a totter or stone tool since be evidence for was last heated