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Earth History - Absolute and Relative Dating

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Last updated about 3 years ago
25 questions
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Question 3
3.

How many eras are there in the Phanerozoic Eon? Name them.

Question 4
4.

Scientists are able to conclude that a forested ecosystem existed in Antarctica millions of years ago by studying

Question 5
5.

A fault is found that cuts through lower rock layers but not those above it. What can most likely be concluded?

Question 6
6.

Which is used in radioactive dating?

Question 7
7.

The law of superposition states

Question 8
8.

What order of events created this area? Youngest (top) to oldest (bottom)

  1. B
  2. X
  3. D
  4. M
  5. A
  6. O
  7. J
Question 9
9.

Which principle of stratigraphy tells you that M is older than J? Use the above picture.

Question 10
10.

What order of events created this area? Youngest (top) to oldest (bottom)

  1. B
  2. S
  3. J
  4. R
  5. M
  6. F
  7. X
  8. A
  9. K
  10. P
Question 11
11.

Which principle of stratigraphy tells you P is older than B? Use the above picture.

Question 12
12.

A fossil was discovered that originally contained 500 grams of Carbon-14 now contains only 15.625 grams of Carbon-14. Approximately how many half lives has this sample experienced and how many years ago was this sample part of a living tree? What geological time period was this fossil from?
1 half-life for Carbon-14 = 5,730 years

Question 13
13.

A sample of igneous rock has only 100 grams remaining out of an initial 400 grams of Potassium-40. How many half-lives has this rock undergone and how old is it? What geologic time period was it formed?
1 half life for potassium-40 = 1.25 billion years

Question 14
14.

What is the only type of rock that can contain fossils?

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Question 16
16.

How do you know that it is missing? What happened to the missing layer?

Use full complete sentences for credit.

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Question 20
20.

Which is older, D or F? What evidence (geologic sequencing law) supports your claim?

Use complete sentences for full credit.

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Question 23
23.

If you wanted to know the exact date of rock H, what could you use?

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Question 25
25.

Why are the batholyth Q and volcano P considered different rocks? Explain your answer is full complete sentences with as much detail as possible.

(Hint: use what you learned about volcanoes and plate tectonics.)

Question 1
1.

What period was 34 million years ago?

Question 2
2.

How many years ago did the Paleozoic end?

Question 15
15.

What section is missing from column I at the unconformity? Compare column I and II to identify the layers in order.

Question 17
17.

Which fossil could be classified as an index fossil?

Question 18
18.

Which principle of stratigraphy is being shown in the picture?

Question 19
19.

Which rock section is the youngest?

Question 21
21.

Which principle of stratigraphy tells you that G is folded?

Question 22
22.

Which principle of stratigraphy would you use to figure out how old (relatively) fault L is?

Question 24
24.

Which event is younger, fault L or volcano P?