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If all Earth’s history took place in one year starting on January 1, humans would have appeared in _______________
all of the above
cyanobacteria
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
December
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
eon
pulled pieces of material together to form planets, including Earth.
organisms
A life-form in the Precambrian time was _____.
all of the above
cyanobacteria
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
December
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
eon
pulled pieces of material together to form planets, including Earth.
organisms
After the Sun formed, gravity _____.
all of the above
cyanobacteria
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
December
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
eon
pulled pieces of material together to form planets, including Earth.
organisms
Why do scientists hypothesize that an asteroid impact led to a mass extinction event?
all of the above
cyanobacteria
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
December
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
eon
pulled pieces of material together to form planets, including Earth.
organisms
How would an asteroid impacting Earth effect the climate?
all of the above
cyanobacteria
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
December
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
eon
pulled pieces of material together to form planets, including Earth.
organisms
Geologic time is divided into units based upon types of _____.
all of the above
cyanobacteria
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
December
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
eon
pulled pieces of material together to form planets, including Earth.
organisms
Major changes in the environment _____.
all of the above
cyanobacteria
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
December
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
eon
pulled pieces of material together to form planets, including Earth.
organisms
The longest subdivision in geologic time is a(n) _____.
all of the above
cyanobacteria
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
December
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
eon
pulled pieces of material together to form planets, including Earth.
organisms
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