earth science Flashcards
1
Q
list the four eras from most recent to the oldest.
A
cenezoic, mesozoic, pelozoic, and precambrian
2
Q
how many years did era precambrian take over? how much percent of earths history is that.
A
4.060 billion years. (88%)
3
Q
how many years did era paleozoic take over? how much percent of earths history is that.
A
295 million years. (8%)
4
Q
how many years did era mesozoic take over? how much percent of earths history is that.
A
189 million years. 3%
5
Q
how many years did era cenezoic take over? how much percent of earths history is that.
A
65 million years. (1%)
6
Q
what era and period were earliest fish first present
A
era: paleozoic
period: ordovician
7
Q
what period and era did we first have multicellular life
A
era: precambrian
period: N/A
8
Q
A
