mass extinction qs

figure 28 (ps turn on answer w term)

440 million

how many years ago was the ordovician-silurian extinction?

ordovician-silurian

first major extinction

glacial/cooling

first phase of the ordovician-silurian extinction

warming

second phase of the ordovician-silurian extinction

abundant plants took CO2

why did a global cooling take place during the ordovician-silurian extinction

drop in sea levels

what happened during the global cooling during the ordovician-silurian extinction

marine

most life was what when the ordovician-silurian extinction occured?

loss of habitat

what happened because of lowering sea levels during the ordovician-silurian extinction

they were adapted to the cooler climates

why couldn’t life survive the global warming during the ordovician-silurian extinction

86%

what percent of life was lost during the ordovician-silurian extinction

365 million

how many years ago was the late devonian extinction?

devonian, carboniferous

between what period did the late devonian extinction take place?

developed deep roots

one theory for the cause of the late devonian extinction is that land plants did what?

put excess nutrients into the ocean

what did land plants developing deep roots do during the late devonian extinction?

algae blooms increased drastically

what happened when excess nutrients were released into the ocean during the late devonian extinction?

they consumed vast amounts of O2

what happened during the late devonian extinction when the algae blooms increased?

suffocation

what is the ultimate reason for the late devonian extinction in the plants growing deep roots theory?

cooled

one theory for the late devonian extinction is that the climate did what?

habitat loss

what is the ultimate reason for the late devonian extinction in the global cooling theory?

75%

what percent of life was lost during the late devonian extinction?

252 million

how many years ago was the permian-triassic extinction?

permian-triassic extinction

what was the deadliest extinction?

Siberian Traps

where was the cause of the permian-triassic extinction?

volcanic

what kind of activity caused the permian-triassic extinction?

carbon dioxide

what was emitted when volcanoes erupted during the permian-triassic extinction

bacteria

what thrived off the CO2 in the atmosphere during the permian-triassic extinction?

methane

what did the bacteria from the permian-triassic extinction emit?

acidic

the combined water and GHGs from the permian-triassic extinction made the oceans and rain what?

96%

what percent of life was lost during the permian-triassic extinction?

201.3 million

how many years ago was the Triassic-Jurassic extinction?

volcanoes

what is the cause in the terrestrial theory for the Triassic-Jurassic extinction?

carbon dioxide

volcanoes released what during the Triassic-Jurassic extinction?

trapped heat

CO2 released during the Triassic-Jurassic extinction did what temperature wise?

acidified them

CO2 released during the Triassic-Jurassic extinction did what to the oceans?

an asteroid/comet

what is the cause of the extraterrestrial theory for the Triassic-Jurassic extinction?

mammals

most of what class died during the Triassic-Jurassic extinction?

dinosaurs’ ancestors

what animals notably survived the Triassic-Jurassic extinction?

80%

what percent of life was lost during the Triassic-Jurassic extinction?

66 million

how many years ago was the cretaceous-paleogene extinction?

the cretaceous-paleogene extinction

which extinction killed the dinosaurs?

an asteroid

what was the cause of the cretaceous-paleogene extinction?

Yucatan Peninsula, Mexico

where did the asteroid hit in the cretaceous-paleogene extinction?

debris

what did the asteroid impact of the cretaceous-paleogene extinction release into the atmosphere?

it dropped

how was temperature affected by the debris during the cretaceous-paleogene extinction?

fires, earthquakes, tsunamis, acid rain

what four disasters would occur locally after the impact of the asteroid in the cretaceous-paleogene extinction?

KT boundary

what is another name for the time between the cretaceous period and tertiary period?

cretaceous, tertiary

between what two periods was the KT boundary?

60-76%

what percent of life was lost during the cretaceous-paleogene extinction?