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9 Cards in this Set

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  • Back
radioactive dating
methods of establishing the age of materials
isotopes
atoms of the same element that differ in the number of neutrons they hold
radioactive decay
some isotopes have unsatlbe nuclei. they tend to release particles or radiant energy, or both
radioactive isotopes
isotopes that undergo radioactive decay
half-life
length of time it takes for 1/2 of any size of an isotope to decay
coacervates
droplests composed of different types of molecules generated in lab test tubes
chemosynthesis
how bacteria obtains energy from the oxidation of various inorganic substances
cyanabacteria
photosynthetic unicellular prokaryotes
endosymbosis:
small prokaryotes gave way to mitochondria/chloroplasts in larger, eukaryotes