Devonian Mass Extinction Quiz

What was the primary cause of the Devonian mass extinction according to the video?

• Human activity

• Volcanic eruptions

• Asteroid impact

• Cooling events

Which species were most affected during the first extinction pulse?

• Tropical taxa like reef builders

• Land mammals

• Birds

• Cold water species

What environmental condition was associated with the second extinction pulse?

• Asteroid impact

• Increased volcanic activity

• Severe cooling and glaciation

• Rise in sea levels

What role did land plants play in the Devonian extinction?

• They increased atmospheric CO2

• They caused anoxia by enhancing weathering

• They provided shelter for marine life

• They blocked sunlight

How did the spread of vascular plants affect the environment during the Devonian period?

• They caused global warming

• They reduced soil formation

• They increased atmospheric CO2

• They promoted weathering and nutrient transport to oceans

What is eutrophication and how did it contribute to the Devonian extinction?

• It is the rise in sea levels

• It is the increase in volcanic activity

• It is the depletion of oxygen in oceans due to nutrient influx

• It is the cooling of the Earth's surface

What extraterrestrial event is hypothesized to have contributed to the Devonian extinction?

• Comet collision

• Solar flare

• Nearby supernova

• Asteroid impact

How might a supernova have affected life on Earth during the Devonian period?

• By causing earthquakes

• By damaging the ozone layer and increasing UV radiation

• By causing global cooling

• By increasing volcanic activity

What volcanic activity is linked to the Devonian extinction?

• Eruption of the Siberian Traps

• Eruption of Mount Vesuvius

• Eruption of the Yellowstone Caldera

• Eruption of the Hawaiian volcanoes

What effect did volcanic eruptions have on the climate during the Devonian extinction?

• They caused global warming

• They led to increased rainfall

• They caused sea levels to rise

• They contributed to global cooling by blocking sunlight