Smithsonian Channel - Mass Extinction Video

Question 1

Grizzly Bears of N. America are at risk due to...

Accepted Answer

Global Climate Change, Increase of Mountain Pine Beetle., Decrease of White Bark Pine

Question 2

Scientist were found that both the Triassic meteor and the Permian Lava Flows occurred...

Accepted Answer

Slightly before their extinction events.

Question 3

The first clue to Alvarez that a meteor was responsible for dinos disappearing was...

Accepted Answer

The element Iridium found in the KT boundary clay.

Question 4

Dr. Barnowski calculates that if extinctions rate continue at current trends...

Accepted Answer

75% of known species will be extinct in 200 years.

Question 5

Ocean shelled animals are at risk when the pH levels of the oceans...

Accepted Answer

Get lower than normal.

Question 6

The lava flows of the Siberian Traps caused...

Accepted Answer

Massive Global Warming, Global Acid Rain

Question 7

Which of these is not a 'trigger' of mass extinctions?

Accepted Answer

Global Warming

Question 8

Dr. Alvarez used ___ to demonstrate a catastrophic event occurred 66 mya.

Accepted Answer

Tiny Algae Shells, Forams, Foraminifora

Question 9

Humans may be causing a time of mass extinction because of...

Accepted Answer

Deforestation, Over hunting, Massive CO2 production, Over Population

Question 10

Which of these DOES NOT describe the meteor responsible for Dino disappearnce?

Accepted Answer

All are true of the meteor.

Question 11

The extinction of reptilian dinosaurs (Triassic Era) was the...

Accepted Answer

MOST RECENT mass extinction, Event that allowed mammals to begin to dominate Earth.

Question 12

Which of these were 'clues' to the cause of the Permian extinction event.

Accepted Answer

Gases trapped in magma, Age of volcanic 'zircons'.

Question 13

Which of these 'stores' the history of the Earth in fossils?

Accepted Answer

Sedimentary Rock

Question 14

Ecosystems collapse...

Accepted Answer

From the bottom up

Question 15

The great dying event caused 90% of species to go extinct in...

Accepted Answer

About 60,000 years

Question 16

The group going extinct quickest today are...

Accepted Answer

Amphibians

Question 17

During the 'great dying', over ____% of species on Earth went extinct.

Accepted Answer

90%

Question 18

Today, species are dying off about ___ times faster than expected in times of 'equilibrium'.

Accepted Answer

Twelve

Question 19

Dating the rocks and crystals is done using...

Accepted Answer

Radioactive Dating

Question 20

What made the Permian (gorgonopsian) extinction so surprising was its...

Accepted Answer

Its incredibly short time frame of extinction.

Question 21

The hypothesis that man may be causing the sixth mass extinction most parallels the...

Accepted Answer

Permian Extinction (Gorgonopsians)

Question 22

There have been ____ known mass extinction events.

Accepted Answer

Five

Question 23

A mass extinction occurs when...

Accepted Answer

At least 50% of all species on Earth die off.

Question 24

The mass extinction that triggered the permian extinction was...

Accepted Answer

Siberian Lava Flows

Question 25

As oceans warm due to Global Warming (climate change)...

Accepted Answer

Oxygen levels decrease., Shelled animals can't make shells.

Smithsonian Channel - Mass Extinction Video

Questions 25

Smithsonian Channel - Mass Extinction Video

Questions 25