gly 1102 topic 37

Unlock all answers in this set

Unlock answers
question
The Barringer Meteor Crater is a young (50,000 years old) crater located inside this state.
answer
Arizona
question
The greatest extinction (in percent of species extinct) in history occurred at the end of this period.
answer
Permian
question
(blank) are \"dusty iceballs\" of rock, frozen water and organic compounds.
answer
Comets
question
Once the flash heating of the atmosphere by the terminal Cretaceous impact cooled, atmospheric temperatures would have risen because of the vast amount of particulate matter in the atmosphere blocking solar radiation from reaching the surface.
answer
false
question
The vast majority of asteroids in our solar system are found in the Asteroid Belt between Jupiter and Pluto.
answer
false
question
The shortcoming of the volcano hypothesis is that it fails to demonstrate that the volume and type of volcanism could have accounted for the impact evidence and there can be little argument that a giant asteroid collided with Earth at precisely the time of the global extinctions.
answer
true
question
A rough estimate of the average duration of species prior to extinction is
answer
about 2 million years.
question
The comet head consists of a solid nucleus surrounded by a (blank) up to 1.5 million miles in diameter.
answer
nebulous coma
question
(Blank) is a rare platinum group metal.
answer
Iridium
question
The Kuiper Cloud is a large, spherical cloud of comets surrounding the solar system.
answer
false
question
The extinction of a species occurs when the last representative of a species is no longer capable of reproducing and dies, leaving only the fossil legacy of its time on earth.
answer
true
question
Microtektites are small, droplet-shaped silica glass cooled from molten material expelled from an impact crater.
answer
true
question
The fossil record reveals that the rate of extinction over geologic history was not a uniform rate.
answer
true
question
The Deccan traps of India and Pakistan, southern Brazil, and the western U. S. all show evidence of extensive volcanism at the time of the C/T boundary.
answer
true
question
The most famous of all extinctions occurred at the end of the (blank) and marks the boundary between the Mesozoic and Cenozoic Eras.
answer
Cretaceous
question
In 1981, the geophysicist G. Penfield found a bowl-shaped depression near the Yucatan Peninsula town of Chicxulub that he thought might be the C/T boundary impact crater.
answer
true
question
Unlike the moon, Earth has very active weathering processes that over time remove the evidence of impacts, or at least make old one s very hard to recognize.
answer
true
question
All dinosaurs became extinct at the Creatceous/Tertiary boundary.
answer
true
Get an explanation on any task
Get unstuck with the help of our AI assistant in seconds
New