During which Periodith1st mass extinction occur?
A) Permian
B) Triassic
C) Jurrasic
D) Ordovician
E) Quaternary
Correct Answer:
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Q35: Thradioisotopandaughter element content armeasureto perfor_ dating.
A)isotonic
B)strontium
C)decay
D)carbon 14
E)radiometric
Q36: Which rock layer is least likely to
Q37: What is thagof tholdest known terrestrial rock?
A)4.404
Q38: Thbreakdown of uraniu238 into lea206 is an
Q39: What is thhalf-lifof uraniu238 to lea206?
A)2.5 million
Q41: What is thcorrect order of lanmass formation
Q42: When dithEarth's crust form?
A)2.9 billion years ago
B)3.2
Q43: Lantetrapods evolvejust prior to which mass extinction?
A)1st
B)2nd
C)3rd
D)4th
E)5th
Q44: Which layer of sedimentary rock is thdeepest?
A)Bright
Q45: Which group is geologically oldest?
A)prokaryotes
B)dinosaurs
C)bees
D)butterflies
E)bony fish
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