Question
The red line on graph below shows how levels of carbon dioxide in the Earth's atmosphere have changed through geologic time. The values on the graph's y-axis are measured in parts per million (ppm).
Which of the following statements about the information in the graph is most likely to be true?
A.
Carbon dioxide levels are higher today than they have been at any other time in geologic history.
B.
During the Carboniferous geologic period, carbon dioxide levels reached their highest point in geologic history.
C.
Human activities contributed to the increase in carbon dioxide levels that occurred during the Jurassic geologic period.
D.
During the Permian geologic period, the amount of carbon dioxide in the atmosphere increased due to natural processes.
Which of the following statements about the information in the graph is most likely to be true?
A.
Carbon dioxide levels are higher today than they have been at any other time in geologic history.
B.
During the Carboniferous geologic period, carbon dioxide levels reached their highest point in geologic history.
C.
Human activities contributed to the increase in carbon dioxide levels that occurred during the Jurassic geologic period.
D.
During the Permian geologic period, the amount of carbon dioxide in the atmosphere increased due to natural processes.
Answers
There are no human answers yet.
Answered by
GPT-4o mini
Without seeing the actual graph, I can only provide a general analysis based on common scientific knowledge about carbon dioxide levels in Earth's history.
To evaluate the statements you provided:
A. **Carbon dioxide levels are higher today than they have been at any other time in geologic history.** - This statement is often discussed in current climate science, as today's levels (over 400 ppm) are higher than they have been for millions of years. If the graph shows historical levels lower than today, this could be true.
B. **During the Carboniferous geologic period, carbon dioxide levels reached their highest point in geologic history.** - The Carboniferous period (approximately 359 to 299 million years ago) is generally associated with high oxygen levels and lower carbon dioxide levels compared to other periods. Historically, CO2 levels were higher in other periods than during the Carboniferous.
C. **Human activities contributed to the increase in carbon dioxide levels that occurred during the Jurassic geologic period.** - The Jurassic period (about 201 to 145 million years ago) predates human activity by millions of years, so this statement is incorrect.
D. **During the Permian geologic period, the amount of carbon dioxide in the atmosphere increased due to natural processes.** - The Permian period (about 299 to 251 million years ago) did see fluctuations in CO2 levels due to natural processes like volcanic activity and continental drift, so this statement has some validity.
Based on common knowledge, **Statement D** is likely the most accurate regarding the natural processes affecting CO2 levels during the Permian period. However, please refer to the graph for any specific trends or data supporting these statements.
To evaluate the statements you provided:
A. **Carbon dioxide levels are higher today than they have been at any other time in geologic history.** - This statement is often discussed in current climate science, as today's levels (over 400 ppm) are higher than they have been for millions of years. If the graph shows historical levels lower than today, this could be true.
B. **During the Carboniferous geologic period, carbon dioxide levels reached their highest point in geologic history.** - The Carboniferous period (approximately 359 to 299 million years ago) is generally associated with high oxygen levels and lower carbon dioxide levels compared to other periods. Historically, CO2 levels were higher in other periods than during the Carboniferous.
C. **Human activities contributed to the increase in carbon dioxide levels that occurred during the Jurassic geologic period.** - The Jurassic period (about 201 to 145 million years ago) predates human activity by millions of years, so this statement is incorrect.
D. **During the Permian geologic period, the amount of carbon dioxide in the atmosphere increased due to natural processes.** - The Permian period (about 299 to 251 million years ago) did see fluctuations in CO2 levels due to natural processes like volcanic activity and continental drift, so this statement has some validity.
Based on common knowledge, **Statement D** is likely the most accurate regarding the natural processes affecting CO2 levels during the Permian period. However, please refer to the graph for any specific trends or data supporting these statements.
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