Past mass extinctions

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%

How many mass extinction events has there already been?

• 4

• 5

• 6

• 7

Which of these is the longest timespan?

• eon

• era

• period

• epoch

Which of these is the shortest timespan?

• eon

• era

• period

• epoch

Which EPOCH are we currently in?

• Phanerozoic

• Cenozoic

• Quaternary

• Holocene

Which of these was the first mass extinction?

• Ordovician

• Devonian

• Permian

• Triassic

In which THREE past mass extinctions did asteroid impacts play a role?

• Cretaceous

• Permian

• Triassic

• Ordovician

Which mass extinction event was the most deadly? (HINT: 95% of species went extinct)

• Permian

• Triassic

• Cretaceous

• Devonian

How many past mass extinctions have been triggered by a species itself?

• 0

• 1

• 2

• 3

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