Conceptual Physical Science Explorations
2nd Edition
ISBN: 9780321567918
Author: Paul G. Hewitt, Leslie A. Hewitt, John A Suchocki
Publisher: Addison Wesley
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Textbook Question
Chapter 29, Problem 7RQ
Which of the geologic time units spans the greatest length of time?
Expert Solution & Answer
To determine
The geologic time units span the greatest length of the time.
Answer to Problem 7RQ
Eons are the unit of geological time and they span the greatest length of time.
Explanation of Solution
The Chronological order of the time for the history of Earth is called the geologic time scale. This scale developed on the basis of the relative ages of different rock layers and their traces. And the Geologic time scale partitions the Earth's 4.5-billion year history into the time units of different intervals.
The largest unit of geologic time is Eons. Eons are part of the Precambrian time. The Eons that we are living was started about 543 million years ago, known as Phanerozoic eon. And the Eons are further divided into shorter time intervals, known as eras.
Conclusion:
Therefore, the eons are the unit of geological time and they span the greatest length of time.
Chapter 29 Solutions
Conceptual Physical Science Explorations
Ch. 29 - Prob. 1RQCh. 29 - A granitic dike is found across a sandstone layer....Ch. 29 - How are fossils used in determining geologic time?Ch. 29 - In a sequence of sedimentary rock layers, the...Ch. 29 - What is radioactive half-life?Ch. 29 - What are the half-lives of uranium-238,...Ch. 29 - Which of the geologic time units spans the...Ch. 29 - Prob. 8RQCh. 29 - Prob. 9RQCh. 29 - Prob. 10RQ
Ch. 29 - Prob. 11RQCh. 29 - Why are the lobe-finned fishes significant?Ch. 29 - Prob. 13RQCh. 29 - What animals group evolved from the amphibians...Ch. 29 - Prob. 15RQCh. 29 - Prob. 16RQCh. 29 - What evidence supports the meteorite impact at the...Ch. 29 - Which epochs make up the tertiary period? The...Ch. 29 - Prob. 19RQCh. 29 - Prob. 20RQCh. 29 - What six principles are used in relative dating?Ch. 29 - Why dont all rock formations show a continuous...Ch. 29 - Prob. 3TECh. 29 - Prob. 4TECh. 29 - Prob. 5TECh. 29 - What was the most noteworthy evidence of life in...Ch. 29 - Prob. 7TECh. 29 - Why are internal nostrils in the lobe-finned...Ch. 29 - What time period is associated with coal deposits?Ch. 29 - Prob. 10TECh. 29 - Prob. 11TECh. 29 - How does the element iridium relate to the time of...Ch. 29 - Suppose you see a sequence of sedimentary rock...Ch. 29 - If a sedimentary rock contains inclusions of...Ch. 29 - Which isotopes are most appropriate for dating...Ch. 29 - Before the discovery of radioactivity, how did...Ch. 29 - Prob. 17TECh. 29 - Prob. 18TECh. 29 - Prob. 19TECh. 29 - Prob. 20TECh. 29 - The principle of superposition is that each new...Ch. 29 - Life forms throughout Earths past have occurred in...Ch. 29 - The time it takes for 50 of a radioactive...Ch. 29 - Development of Earths ocean was likely due to (a)...Ch. 29 - Prob. 5RATCh. 29 - Prob. 6RATCh. 29 - Prob. 7RATCh. 29 - The formation of the supercontinent Pangaea (a)...Ch. 29 - Prob. 9RATCh. 29 - Prob. 10RAT
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