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Earth's "Past"
Earth Science Book
12
Science
9th Grade
01/21/2015

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Cards

Term
Radiactive Decay
Definition
Unstable nuclie break apart releasing energy
Term
Half Life
Definition
amount remaining of an isotope
Term
Radiometric Dating
Definition
Ratio between daughter and parent isotope, more daughter means it's older
Term
Radio Carbon Dating
Definition
Dating with carbon 14 and carbon 12
Term
Sedimentary Dating
Definition
Two igneous rock features to determine the age
Term
Precabrian Time
Definition
"Earth forms, atmoshpere forms, ocean forms, and continents"
Term
Formation of Earth
Definition
"Rock and dust etc. put together by gravity. Heavy went down light when down."
Term
Atmoshpere Forms
Definition
"First it was carbon and nitrogen. Later organims took the carbon and turned it to oxi"
Term
Early Life
Definition
"First organisms were in vents in the ocean"
Term
Cyanobacteria
Definition
made it's own food
Term
Prokaryote
Definition
early one celled oranisim
Term
Eukaryote
Definition
More complex than Prokaryote. It is multi-celled and has a nuclei.
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