easy · Enhanced ACT science
Scientist 1: The extinction of the dinosaurs was caused by a massive asteroid impact that blocked sunlight and cooled the Earth.
Scientist 2: Massive volcanic eruptions in India released gases that caused global warming and ocean acidification, leading to extinction.
Which of the following discoveries would most directly support the claim of Scientist 2 over Scientist 1?
- Finding that volcanoes were active during the Jurassic period
- Fossil evidence of ocean pH drops before the extinction
- Evidence that the dinosaurs went extinct very suddenly
- A layer of iridium found in rocks across the entire globe
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