1.Geological Problems- scientists have names for periods of past time characterized by successive types of plants and animals, and by climatic changes.
2.Chemical Dating- such as radio-carbon dating and potassium-argon method. Dating measures the use of decay potassium to give out the gas argon.
3.Radio-carbon dating measures the rate of decay carbon fossils and organic substance.
Hence the amount of argon-40 compared to the account of potassium gives direct measures of age.
4.Potassium-argon method- is used to date volcanic ash. Potassium is emitted during volcanic eruptions. This method is also used to date minerals containing potassium. As soon as the potassium is deposited, the radioactive potassium-40 immediately begins to decay into the gas argon. The argon is retained in the mineral or rock unless there is earth movement, given that the rate of decay of potassium is unknown, the amount of argon-40 compared with the amount of potassium, v=gives a direct measure of age.
5.Stratigraphy-the study and interpretation layers of rocks successfully deposited at a place (sedimentation).
6.Fission-Track Dating- the age of minerals and glass as estimated by observing the tracks made in them by the fission fragment of the uranium made that they contain.
7.Lexico- Statistics Dating- the study of vocabulary of languages with the interest to determine their age and their historical lines with other languages.
8.Statistical Dating-the use of calculation using a system of arranging the length of generation can be determined for a particular society.
9.Genetics: genetics is the scientific study of heredity and the variation of inherited characteristics.
It therefore studies how characteristics are passed from parents to their offspring’s through their genes (this is known as hereditary).
Moraa orina answered the question on November 15, 2018 at 18:04
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