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PSSA Vocab unit 11

TermDefinition
radioactive isotope also called radioisotope, any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays.
carbon chemistry is a chemical element with symbol C and atomic number six.It is nonmetallic and tetravalent.
science the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment
nova is a cataclysmic nuclear explosion on a white dwarf, which causes a sudden brightening of the star.
scale each of the small, thin horny or bony plates protecting the skin of fish and reptiles, typically overlapping one another.
theory of evolution The theory of evolution by natural selection is the nonrandom survival and reproductive success of randomly varying organisms.
Created by: twistybraids03