Extinctions Quiz

Quiz Questions And Answers

Which of the following is NOT an accepted criterion for a mass extinction event?

The event must have occurred in a relatively short time frame.

The cause of the mass extinction must be obvious.

A significant part of life on Earth became extinct.

The extinction involves multiple lifeforms and is widespread.

Which of the following mass extinctions occurred first?

Ordovician-Silurian

Cambrian

Late Devonian

End Permian

Which of the following events resulted in the most species extinctions overall?

Cretaceous-Tertiary

Ordovician-Silurian

End Triassic

End Permian

What is another widely used name for the Cretaceous-Tertiary boundary?

K-T boundary

M-C boundary

C-T boundary

X1-X2 boundary

In our planet's violent past, flood basalts have been found to have been a possible cause of extinctions. What is a flood basalt?

Abrupt melting of glacial ice which floods a large area.

A meteorite explodes in the area and showers a large area with a fine dust of particulate matter.

A collapse of an unstable mountainous region which floods the area with rock deposits.

Volcanic eruptions along a fissure expelling large amounts of low-viscosity lava.

Methane clathrates are another possible factor in global extinction events. What are they?

Poisonous methane gasses that are released after a volcanic eruption.

Methane gas released from a fissure after a large earthquake.

Bogs of methane that occur naturally on land.

Collections of frozen methane pockets that form on continental shelves under the oceans.

Which of the following has the most support among scientists as the cause of the largest extinction event during the Permian era?

The formation of Pangaea.

Flood basalts

A rise in sea level.

Glaciation.

The Devonian extinction had the most effect on which community of species that were living at the time?

Terrestrial plants.

Freshwater tetrapods.

Small mammals.

Marine reef builders.

Which of the following is true of the Permian Extinction?

All small crustaceans became extinct.

Nearly all woodland plant species died out.

All bivalves were wiped out.

Most Gorgonopsians survived.

Of the following, which is the most dominant benefit of mass extinctions?

It creates more food for the surviving species.

It allows acceleration of the evolution of some species.

There are no benefits to mass extinctions.

Weak, less viable species are eliminated.

ANSWERS

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