Absolute Dating
Relative Dating
Geologic History
Final Jeopardy
100
Percent parent material remaining after 2 half lives
25%
100
law of superposition states that...
oldest is on bottom
100
correct order for the 4 ways we divide geologic time
Eon, era, period, epoch
200
how far back Carbon-14 dating works (in years)
75,000 years
200
Law that states whether E or D is older
law of cross-cutting relationships
200
88% of earth's history
Precambrian
300
Unstable isotopes have too many of these
neutrons
300
What A represents
unconformity
300
complexity of living things today vs 500 mya
living things in the past are more simple
400
The half life of this isotope
4 minutes
400
what relative dating is meant to do (what's its purpose or definition?)
Determine the correct order in which the rocks formed, not their exact age
400
The event that happened to start the Cenozoic Era
Dinosaurs died off
500
You have 600 particles of some isotope. 8 minutes pass. How many parent AND daughter particles do you have?
150 parent, 450 daughter
500
the correct order
E, G, B, D, A, F, C
500
The period land plants first developed.
Ordovician period
500
What happened today happened a long time ago (what word matches that definition?)
uniformitarianism