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Absolute & Relative Age

Last updated over 3 years ago

5 questions

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1

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Question 1

1.

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?

Layer A is older than B

The sediments in layer B were deposited before those in layer A

Layers A and B are probably about the same age

Layer B probably contains more radioactive isotopes than layer A

Question 2

2.

Which of these is an example of relative age?

Fossil A is older than Fossil B

Fossil A is 250 million years old

Fossil B is 200 million years old

Fossil B was formed 50 million years after Fossil A

Question 3

3.

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?

2000

4000

6000

8000

Question 4

4.

Which of the following statements represents the absolute age of the subject?

Fossil A is older than Fossil B

Fossil C is 50 million years old

Fossil D is older than the last mass extinction

There is no way of determining absolute age

Question 5

5.

The earth is approximately 4.6 billion years old. How much of this time is considered to be Precambrian time?

10% of earth's history

90% of earth's history

All of the time after the dinosaurs extinction

All of the time since the Big Bang