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Dinosaur Mass Extinction Flashcards | StudBud

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Dinosaur Mass Extinction

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earth science, asteroid impact, chicxulub, iridium 66 million years ago

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Questions 7

Answers

1
What evidence supports the asteroid impact hypothesis?
iridium deposits
all are correct
accurate dating techniques
craters
2
Layers of Earth found above the 65 million year old iridium layer contain
water
no dinosaur fossils
dinosaur fossils
magma
3
What is the K-Pg boundry?
A thin layer of sediment with iridium in it.
A boarder between Mexico and the US.
A thin layer of gold found around the world.
The boundary between clay and rock.
4
What caused the extinction of most dinosaurs?
An Asteroid
Mutations
None, dinosaurs are still alive
A virus
5
The speed of an asteroid can exceed
1000 mph
the speed of a bullet
light speed
20 times the speed of a bullet (40k mph)
6
When did most of the dinosaurs die?
15 million years ago
66 million years ago
156 million years ago
250 million years ago
7
The asteroid that impacted at Chicxulub was believed to have been
600 kilometers wide
6 miles wide
10 meters wide
23 miles wide