The Earth is approximately 4.6 billion years old. How much of this time is considered to be Precambrian time?
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Question 2
2.
Which of the following statements represents the absolute age of the subject?
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Question 3
3.
The fossil found in level C is estimated to be 40,000-50,000 years old. Therefore, the fossil found in level D must be...
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Question 4
4.
The same index fossil is found in rock layers A and B that are separated by several miles. What can you infer about the relationship between the rock layers?
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Question 5
5.
If a sample of Carbon-14 starts with 500 atoms, how many would there be after one half-life?
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Question 6
6.
If the half-life for the sample above is 2,000 years, how old is the sample when there is 25% of the parent element remaining?