easy · GMAT Verbal Reasoning
Antarctic ice cores provide a unique window into the Earth's climatic history by trapping atmospheric gases in layers of frozen ice. Scientists analyze the chemical composition of these gases to reconstruct global temperatures from thousands of years ago. These studies reveal a strong correlation between atmospheric carbon dioxide levels and historical temperature shifts.
The primary purpose of the passage is to do which of the following?
- Argue that present-day carbon dioxide levels are the highest in all recorded history.
- Criticize the chemical methods that scientists rely on to analyze the frozen ice.
- Explain the engineering process of drilling deep for ice in the Antarctic.
- Describe how ice cores are used to reconstruct historical climate patterns.
- Forecast the precise rate at which global temperatures will change in coming decades.
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