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Mass Extinction of Dinosaurs: K-T Event

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Questions and Answers

What element found in abundance only in space corresponds to the precise time the dinosaurs died?

Gold

Silver

Iridium (correct)

Platinum

The abbreviation 'K' in the K-T extinction event is associated with which German word?

Kreidezeit (correct)

Kreuzung

Konzert

Kontinent

How long did dinosaurs roam the earth before their sudden demise?

200 million years

100 million years

65.5 million years

160 million years (correct)

Who discovered the distinct layer of iridium in the geological record that corresponds to the precise time the dinosaurs died?

Luis and Walter Alvarez Signup and view all the answers

What was one early theory proposed by paleontologists for the extensive die-off of dinosaurs and other species?

Small mammals ate dinosaur eggs Signup and view all the answers

What is one of the theories proposed for the extinction of dinosaurs?

Volcanism from the Deccan Traps Signup and view all the answers

What evidence led to the Alvarez hypothesis about the extinction of dinosaurs?

Oddly high amount of iridium in the K-Pg layer Signup and view all the answers

What is one of the reasons why some scientists dispute the meteor impact theory for dinosaur extinction?

Inconclusive evidence for a massive meteor impact event Signup and view all the answers

What is the name of the theory proposed by Luis and Walter Alvarez?

The Alvarez hypothesis Signup and view all the answers

What is suggested as a potential combination of theories for the extinction of dinosaurs?

Volcanism weakening ecosystems followed by an incoming meteor Signup and view all the answers