WorksheetsDinosaur Extinction
Total questions: 15
Worksheet time: 15mins
How old is the K-T boundary?
65 MYA
4.5 BYA
2 MYA
A long time ago
What is unique about the K-T boundary?
The color it has
It's enormous width
The position in the sediments
Its high concentration of Iridium
Where did the Iridium in K-T boundary come from ?
The explosion of a Supernova
An asteroid that crashed into the Earth
The Sun
The vulcanism that occurred during Carboniferous
Where was the crater found?
In the Yucatan Peninsula
In Mexico DC
In Texas
In North Dakota
Why can the K-T boundary be considered like a "last frontier" for Dinosaurs?
They loved this layer of clay
No dinosaur fossils have been found above this layer
No dinosaur fossils have been found below this layer
They lived in this layer of clay
What is the name the transition marked by the clay?
ZA boundary
AZ boundary
Extinction event
KT boundary
Why did Louis Alvarex get the idea that the boundary clay at the KT boundary was the result of an asteroid impact?
Because it contains daimonds
Because it contains large stones
Because it contains a high amount of Iridium
Because it contains shocked quartz
What kind of plants resisted the catastrophic impact the best?
Oaks
Grass
Ferns
All of above
Many scientist believe ________________ from space played a role in dinosaur extinction.
stars
planets
supernovas
meteorites
What blocked the sunlight and contributed to dinosaur extinction?
huge plant leaves
dust from a meteorite crashing into Earth
tall mountains
100 days of rain clouds
Dinosaurs became extinct approximately
65 million years ago
4.6 billion years ago
25, 000 years ago
165 million years ago
What is the most widely accepted theory for the extinction of the dinosaurs?
Volcanic eruptions
Asteroid impact
Climate change
Disease outbreak
Which element found in high concentrations in the K-T boundary layer supports the asteroid impact theory?
Gold
Iridium
Carbon
Uranium
What is the name of the crater associated with the asteroid impact that led to the extinction of the dinosaurs?
Chicxulub Crater
Vredefort Crater
Barringer Crater
Sudbury Basin
How did the asteroid impact lead to the extinction of the dinosaurs?
It caused massive volcanic eruptions
It led to a nuclear winter effect
It increased oxygen levels
It caused a global flood
