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When did plants first colonize land?
tens of millions of years
dinosaur extinction
the age, in years, of a geological event
about 440 million years ago
provides the absolute age of the rock
billions of years
hundreds of millions of years
4.6 billion years old
Eras are chunks of time that last:
tens of millions of years
dinosaur extinction
the age, in years, of a geological event
about 440 million years ago
provides the absolute age of the rock
billions of years
hundreds of millions of years
4.6 billion years old
Eons are chunks of time that last:
tens of millions of years
dinosaur extinction
the age, in years, of a geological event
about 440 million years ago
provides the absolute age of the rock
billions of years
hundreds of millions of years
4.6 billion years old
Relative dating methods are used to determine:
tens of millions of years
dinosaur extinction
the age, in years, of a geological event
about 440 million years ago
provides the absolute age of the rock
billions of years
hundreds of millions of years
4.6 billion years old
We learn, in Geology, that which of the following comes first?
tens of millions of years
dinosaur extinction
the age, in years, of a geological event
about 440 million years ago
provides the absolute age of the rock
billions of years
hundreds of millions of years
4.6 billion years old
Measurement of radioactive elements in rocks:
tens of millions of years
dinosaur extinction
the age, in years, of a geological event
about 440 million years ago
provides the absolute age of the rock
billions of years
hundreds of millions of years
4.6 billion years old
Periods are chunks of time that last:
tens of millions of years
dinosaur extinction
the age, in years, of a geological event
about 440 million years ago
provides the absolute age of the rock
billions of years
hundreds of millions of years
4.6 billion years old
Geologists have recently determined that Earth is approximately (or about):
tens of millions of years
dinosaur extinction
the age, in years, of a geological event
about 440 million years ago
provides the absolute age of the rock
billions of years
hundreds of millions of years
4.6 billion years old
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