Ordovician-Silurian
Devonian
Permian
Triassic/Jurassic
The Cretaceous-Tertiary mass extinction
100
How ling ago was it?
443 mya
100
The worst affect was ______. A. Volcanoes B. Shallow seas C. Metier impact
B. Shallow seas
100
What was it's nickname? A. The Great Dying B. There is no nickname. C. The Permian Mass Extinction
The Great Dying
100
When did the Triassic/Jurassic period start ?
What is 200 million years ago.
100
What is another name for the Cretaceous-Tertiary mass extinction ?
What is the K/T Extinction
200
What was a possible cause?
Climate change
200
What % of life was destroyed? A.25% B.90% C.75%
C.75%
200
What percentage of life died ? A. 20% B. 80% C. 90%
90%
200
Why is this the considered the most famous of the mass extinctions?
It was the death of the dinosaurs.
300
Was it the end of the dinosaurs?
No
300
What was a possible cause? A. Flood B. Meteor C. Earthquake
B. Metior impact
300
Do scientists think that there are at least 2 causes of this mass extinction
Yes
300
What percent of species went extinct during this event? A. 25% B. 90% C. 50%
What is 50%
300
What is believed to be the final cause of this extinction?
An asteroid hitting near the Yucatan, Mexico
400
Was more life sea or land?
Sea
400
_______ took a hammering and didnt retern to there former glory until 100 million years later. A. Reefs B. Fish C. Birds
A. Reefs
400
All life today has descended from what percentage that was left over during the mass extinction
What is 4%
400
Were plants or animals less effected during this event ?
What is Plants
400
When did the cretaceous period end ? A. 500 mya B. 65 mya C. 1 mya
65 million years ago
500
A __________ messed up the chemistry of the ocean, climate fall, and a change in sea level.
A big ice sheet
500
When did it start? A. 429 mya B. 753 mya C. 359 mya
C. 359 mya
500
What are 3 suspected causes of the mas extinction
Asteriod Methane gas release A drop in oxygen level
500
Name 3 likely causes of this mass extinction
Climate change, flood basalt eruptions, and an asteroid impact
500
Did people and dinosaurs exist together during this period ?
What is No, humans and dinosaurs never existed together.
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