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- 1. Multiple Choice
Approximately what % of species have to go extinct in a short geological timespan for an event to be considered a MASS extinction?
45%
55%
65%
75%
- 2. Multiple Choice
How many mass extinction events has there already been?
4
5
6
7
- 3. Multiple Choice
Which of these is the longest timespan?
eon
era
period
epoch
- 4. Multiple Choice
Which of these is the shortest timespan?
eon
era
period
epoch
- 5. Multiple Choice
Which EPOCH are we currently in?
Phanerozoic
Cenozoic
Quaternary
Holocene
- 6. Multiple Choice
Which of these was the first mass extinction?
Ordovician
Devonian
Permian
Triassic
- 7. Multiple Choice
In which THREE past mass extinctions did asteroid impacts play a role?
Cretaceous
Permian
Triassic
Ordovician
- 8. Multiple Choice
Which mass extinction event was the most deadly? (HINT: 95% of species went extinct)
Permian
Triassic
Cretaceous
Devonian
- 9. Multiple Choice
How many past mass extinctions have been triggered by a species itself?
0
1
2
3
- 10. Multiple Choice
Which one is a positive outcome of mass extinctions?
New evolutionary branches have opportunities to develop
Loss of biodiversity
Medicinal plants are no longer available
Apex predators have less prey to eat
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