science 3.5 Flashcards
1
Q
geological time scale
A
the standard method used to divide the earths long natural history in manageable parts
2
Q
eons
A
the largest division of geologic time
3
Q
eras
A
a unit of geologic time that includes two or more periods
4
Q
periods
A
a unit of geologic time into which ares are divided
5
Q
epochs
A
a subdivision of a geologic time
6
Q
extinction
A
the death of every member of a species
