GLY1102 Topic 37

question

The shortcoming of the volcanic hypothesis is that it fails to demonstrate 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

The extinction of a species occurs when the last representative of the species is no longer capable of reproducing and dies, leaving only the fossil legacy of its time on Earth.
answer

True
question

The fossil record reveals that the rate of extinction over a geologic history was not a uniform rate.
answer

True
question

The Kuiper Cloud is a large, spherical cloud of comets surround the solar system.
answer

False
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 fossil record reveals that extinctions typically involve all forms of life (invertebrates, vertebrates, plants, etc) at similar rates.
answer

False
question

The Barringer Meteor Crater is a young (50,000 years old) crater located in 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

A rough estimate of the average duration of species prior to extinction is ______.
answer

About 2 million years
question

The fossil record reveals that most species extinctions were caused by changes in the natural environment.
answer

True
question

The comet head consists of a solid nucleus surround by a _____ up to 1.5 million miles in diameter.
answer

Nebulous coma
question

______ are \”dusty iceballs\” of rock, frozen water, and organic compounds.
answer

Comets
question

All dinosaurs became extinct at the Cretaceous/Tertiary boundary.
answer

True
question

Unlike the moon, Earth has a very active weathering process that over time remove the evidence of impacts, or at least make old ones very hard to recognize.
answer

True
question

The most famous of all extinctions occurred at the end of the ____ and marks the boundary between the Mesozoic and Cenozoic eras.
answer

Cretaceous
question

____ is a rare platinum group metal.
answer

Iridium
question

The Deccan traps of India and Pakistan, southern Brazil, and the western US all show evidence of extensive volcanism at the time of the C/T boundary.
answer

True
question

Microtekites are small, droplet-shaped silica glass cooled form molten material expelled form an impact crater.
answer

True
question

The vast majority of asteroids in our solar system are found in the Asteroid Belt between Jupiter and Pluto.
answer

False
question

In 1981, the geophysicist G. Penfield, found a bow-shaped depression near the Yucatan Peninsula town of Chicxulub tat he thought might be the C/T boundary impact crater.
answer

True

Get instant access to
all materials

Become a Member