The first fossil remains are from this geologic time.
A) Pre-Cambrian
B) Cambrian
C) Paleozoic
D) Cenozoic
E) Mesozoic
Correct Answer:
Verified
Q37: Carbon-14 decays and becomes
A) carbon-16.
B) nitrogen-14.
C) carbon-11.
D)
Q38: To determine the age of rocks,the decay
Q39: The half-life of potassium-40 is 1.3 billion
Q40: Half-life is an estimate of
A) half of
Q41: If a radiometric analysis of an isotope
Q43: The first diverse animal world appeared during
Q44: Where are MOST fossils found?
A) igneous rock
B)
Q45: The half-life of an isotope is 5,000
Q46: Where would the most lead be found
Q47: This gas began to accumulate between 3
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