Examkin

Question

Difficulty: MediumRhetorical Synthesis: Summarization and Generalization

While researching paleoclimatology, a student takes the following notes:
* Researchers analyzed the carbon-13 isotope levels in the growth rings of African baobab trees (*Adansonia digitata*) in Zimbabwe.
* The analyzed trees span a period of over one thousand years, from 1000 to 2020 CE.
* Elevated carbon-13 isotope levels in the tree rings indicate periods of drought.
* Lower levels of carbon-13 isotope correspond to periods of increased rainfall.
* The researchers utilized these isotope measurements to reconstruct a detailed record of rainfall history in southern Africa.

The student wants to summarize the study and its findings. Which choice most effectively uses information from the notes to accomplish this goal?

  1. A
    African baobab trees (*Adansonia digitata*) in Zimbabwe contain carbon-13 isotopes that are elevated during droughts and lower during times of high rainfall.
  2. By analyzing carbon-13 levels in Zimbabwean baobab tree rings spanning from 1000 to 2020 CE, researchers reconstructed a detailed, millennium-long record of rainfall patterns in southern Africa.Answer
  3. C
    Researchers analyzed African baobab trees (*Adansonia digitata*) in Zimbabwe spanning from 1000 to 2020 CE to understand paleoclimatology.
  4. D
    Researchers used baobab tree rings to demonstrate that southern Africa experienced more severe droughts than periods of rainfall over the last millennium.

Answer

The correct answer summarizes the study by stating that researchers reconstructed a detailed, millennium-long record of rainfall patterns in southern Africa by analyzing carbon-13 levels in Zimbabwean baobab tree rings from 1000 to 2020 CE.
The correct answer effectively summarizes both the methodology and the findings of the study by combining the location and timeframe of the studied trees (Zimbabwe, 1000 to 2020 CE) with the analytical method (carbon-13 levels in tree rings) and the ultimate result of the research (reconstructing a detailed record of rainfall patterns).

Step-by-Step Solution

1
Identify the rhetorical goal specified in the prompt.
The student wants to summarize the study and its findings.
Understanding the goal helps filter out choices that focus only on introducing the topic, comparing elements, or highlighting minor details.
2
Analyze the notes to determine the key elements of the study and its findings.
The study involved measuring carbon-13 isotopes in baobab tree rings in Zimbabwe from 1000 to 2020 CE, and the finding was a reconstructed record of southern African rainfall history.
A complete summary must include both the primary method/subject of the study and its ultimate outcome or finding.
3
Evaluate the choices to find the one that combines these key elements.
The option describing the reconstruction of the millennium-long rainfall history using baobab tree rings from 1000 to 2020 CE is selected.
This option is the only one that comprehensively covers both the scope of the study and its findings without focusing on minor details or misrepresenting the data.

Key Concept

Rhetorical Synthesis: Summarization and Generalization
Rate this question

Topics

Rhetorical Synthesis: Summarization and Generalization

More questions from this topic