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Chapter 14

Section 2: Earth's History

TermDefinition
Radiometric Dating A method of establishing that age of a material
Isotope Atoms of the same element that differ in the number of neutrons contained
Mass Number The total number of protons and neutrons in the nucleus
Radioactive Decay The nuclei release particles or radiant energy, or both until the nuclei become stable
Radioactive Isotope Isotopes that undergo radioactive decay
Half-Life The time is takes for 1/2 of the sample size to decay to a stable form
Microsphere Spherical in shape and are composed of many protein molecules that are organized as a membrane
Coacervate Collection of droplets that are composed of molecules o different types, including lipids, amino acids, and sugars
Created by: McLeanE18