Answers2026 Summer 305 CR_2002040-MJ Comprehensive Science 1Scientific Inquiry

Scientific Inquiry Answers

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What initial observation led to the Alvarez asteroid-impact theory?

A
a large undersea crater off the coast of the Yucatan Peninsula in Mexico
B
high iridium levels in a 66-million-year-old clay layer in Denmark and Italy
C
large concentrations of shock-fractured quartz in rock layers found in Europe
D
dinosaur remains found near a large crater formed by an asteroid impact

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