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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Chapter 29, Problem 7RAT
To determine
The correct option for the statement “The most important event during Cambrian period was the”.
Expert Solution & Answer
Answer to Problem 7RAT
The correct option for the statement “The most important event during Cambrian period was the” is option (b).
Explanation of Solution
The Cambrian period is understood as the explosion of life forms. In this period of time, the Earth became warmer than the Proterozoic period. The ice glaciers melted and raised the level of sea water. The low elevation areas of the continents were covered by the sea water. This creates a habitat for the marine organism and increases the diversity of life.
The most important event of this era is many organisms got to know the ability to secrete calcium carbonate and calcium sulfate to the formation of outer skeleton or shell.
Conclusion:
herefore, the correct option for the statement “The most important event during Cambrian period was the” is option (b).
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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