Test 2: Chapter 8 Flashcards
(5 cards)
1
Q
what is superposition:
A
-rocks at the bottom are the oldest
2
Q
what does proterozoic mean:
A
-earlier life
3
Q
what does phanerozoic mean
A
-life revealed
4
Q
what is a half life:
A
-the time it takes for half of the parent isotope to convert to daughter atoms
5
Q
what is uniformitarianism:
A
-the same event would happen under the same conditions whether it was millions of years ago or today
