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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Question
Chapter 29, Problem 5RAT
To determine
The correct option for the statement “The buildup of free oxygen was crucial to the emergence of life on Earth because it led to the formation of ”.
Expert Solution & Answer
Answer to Problem 5RAT
The correct option for the statement “The buildup of free oxygen was crucial to the emergence of life on Earth because it led to the formation of ” is option (b).
Explanation of Solution
Oxygen is mostly present in the atmosphere as well as in the universe. Oxygen present in the atmosphere can easily react with other elements present near it. Free oxygen is the oxygen that does not react with other elements such as carbon, nitrogen, and sulfur.
The free oxygen atom can quickly join with the oxygen atom and formed ozone in the presence of ultraviolet light. These ozone atoms collect and form the ozone layer as a shield of Earth. Ultraviolet rays are harmful rays which can cause serious health issues for humans as well as other organisms also. Ozone layer consumes most of the ultraviolet light that falls on Earth.
Conclusion:
Therefore, the correct option for the statement “The buildup of free oxygen was crucial to the emergence of life on Earth because it led to the formation of ” 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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