A portion of a popular college text in historical geology includes 10 chapters (

Question

A portion of a popular college text in historical geology includes 10 chapters (281 pages) in a unit titled “The Story of Earth.” Two chapters (49 pages) are devoted to Precambrian time. By contrast, the last two chapters (67 pages) focus on the most recent 23 million years, with 25 of those pages devoted to the Holocene Epoch, which began 10,000 years ago.

a. Compare the percentage of pages devoted to the Precambrian to the actual percentage of geologic time that this span represents.

b. How does the number of pages about the Holocene compare to its actual percentage of geologic time?

c. Suggest some reasons why the text seems to have such an unequal treatment of Earth history.

Explanation / Answer

Answer:a

17.43% is devoted to precambrian age.

Answer:b

0.08% is devoted to Holocene age.

Answer:c

This unequal distribution of percentage because of their detailing of age, since precambrian age bracket is large from 4.6 billion to 542 million years. And Holocene age bracket is about only 10,000 years.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.