Scientists Evaluating the Cretaceous Mass Extinction Have Concluded That

question 30

Multiple Choice

Scientists evaluating the Cretaceous mass extinction have concluded that

• A)an asteroid impact was probably the triggering event for the extinction.
• B)only an extraterrestrial impact could have caused such a big extinction event.
• C)climate change would not have been involved in producing the extinctions.
• D)ecological factors such as disease and competition probably caused the dinosaurs to go extinct.

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