What is relative and absolute dating
Stratigraphy: Study of layers of rocks or the objects embedded within those layers.The age of the remains of plants, animals, and other organic material can be determined by measuring the amount of carbon-14 contained in that material.The most widely used and accepted form of absolute dating is radioactive decay dating. Radioactive decay refers to the process in which a radioactive form of an element is converted into a nonradioactive product at a regular rate.The nucleus of every radioactive element (such as radium and uranium) spontaneously disintegrates over time, transforming itself into the nucleus of an atom of a different element.Absolute dating methods are used to determine an actual date in years for the age of an object.Before the advent of absolute dating methods in the twentieth century, nearly all dating was relative.
If you have 3 layers of rock, the one in the middle is younger thanthe bottom one and older than the top one."Radiometric dating" gives you an exact date of formation for alayer or a rock, even if you don't have another layer or rock tocompare it with.Dating techniques are procedures used by scientists to determine the age of an object or a series of events.To determine a fairly precise age of a rock or mineral, geologistsuse a method called radiometric dating, which involves thedetermination of the amount of certain isotopes that are present.The age is based on the half-life of the isotopes (their rate ofdecay over time).