Eons
Subdivision of the Precambrian Supereon; existing between 4540-4000 million years ago.
Hadean Eon
The products of radioactive decay.
Daughter Isotopes
Subdivision of eras.
Periods
Time zone within the geologic time scale lasting between 4.54 billion years ago until approximately 541 million years ago.
Precambrian Supereon
Mr. Micheal's favorite drink.
Coffee
Subdivision of the Precambrian supereon; existing between 2500–541 million years ago.
Proterozoic Eon
Method of determining the numeric age of an object
through the analysis of its radioactive decay rate.
Radiometric Dating
The actual age of an object as measured in years.
Numerical Age
Subdivision of eons.
Era
Mr. Micheal moved to Arizona this state.
Wisconsin
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What is the name of Mr. Micheal's dog?
Colt
The amount of time needed for one half of a radioactive isotope’s parent volume to be reduced by half.
Half-life
Unique radiometric dating method which provides two separate daughter isotopes in which to check its validity.
Uranium-Lead Dating Method
Law stating that the oldest strata are located below
younger strata within the geologic time scale.
Law of Superposition
Mr. Micheal grew up in this state
Kansas
Divides the Precambrian supereon at ~541 million years ago and extends to the current time.
Phanerozoic Eon
The rate in which a radioactive isotope undergoes a spontaneous splitting of its nucleus.
Radioactive Decay Rate
The approximate age of an object or event determined by comparing it to its location among other younger/older objects.
Relative Age
Layers of sediments.
Strata
Elements with the same number of protons but different numbers of neutrons.
Isotopes
Subdivision of the Precambrian supereon; existing between 4000–2500 million years ago.
Archaean Eon
A volume of radioactive material that undergoes a decay (splitting) into daughter isotopes.
Parent Volume
Largest time zone within the geologic time scale.
Supereon
System of mapping the various stratum of the geosphere for the study of earth’s history.
Geologic Time Scale
Idea stating that natural events occur regularly throughout the history of the earth in the same general ways.
Principle of Uniformitarianism