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12 Cards in this Set
- Front
- Back
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Earth began to form...
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4.6 billion years ago
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Radioactive Dating
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a method of determining the age of an object by meauring the amount of specific radioactive isitope it contains
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Isotope
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atoms of the same elment that differ in tier number of neautrins
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Radioactive decay
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isotopes with unstable nucleri that undergo radioactive decay
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half-life
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the legnth of time it taks for one-half of any size sample of an isotope to decay
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carbon datings is used to..
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date organic remains dated less ago
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Oparin suggested that...
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the early atmosphere contained ammonia, hydrogen, water vapor, and other compounds such as methane
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miller and erey...
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set up expireiment to test oparin
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microspheres
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spherical in shape and composed of many protein molecules
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coaservates
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collection of droplets that are composed of molecules of different types such as amino acids and sugars
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micro and coas have life like properties
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take up certain subtances, coacervates grow, microscpeheres can bud
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radioactive isotopes
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isotopes with unstable nuclei that undergo radioactive decay
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