Vocabulary
Half life
The amount of time it takes for half of the total amount of an isotope to decay.
When is Carbon "stable"
Before it decays
Eras are
The largest unit of time
Carbon Dating
Determining age using carbon decay percentage.
When would you use carbon over uranium?
younger
Epochs are
The smallest unit of time
Decay
Atom changes from one isotope to another after a period of time
When would you use uranium over carbon?
older
Cyanobacteria are responsible for:
Introducing oxygen to the oceans
Stability
The ability of the atom to avoid decay
Both read as 0%
Earths first corals were present in which period:
Ordivician
Isotope
The current form of the atom, based on number of neutrons
The youngest materials are in this rock layer
top
The period 350 million years ago
Mississippian