Earth Science Rocks And Fossils Review Questions 1 - 10: Question Preview (ID: 8779)


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Geologists have recently determined that Earth is approximately (or about):
a) 4.6 billion years old b) 44 billion years old c) 440 million years old d) 4.4 billion years old
Eons are chunks of time that last:
a) millions of years b) tens of millions of years c) hundreds of millions of years d) billions of years
Epochs are chunks of time that last:
a) millions of years b) tens of millions of years c) hundreds of millions of years d) billions of years
Periods are chunks of time that last:
a) millions of years b) tens of millions of years c) hundreds of millions of years d) billions of years
Eras are chunks of time that last:
a) millions of years b) tens of millions of years c) hundreds of millions of years d) billions of years
Measurement of radioactive elements in rocks:
a) is no good because of nuclear testing and bombs b) doesn't do anything at all c) provides the absolute age of the rock d) is not a good way to measure the age of a rock
What is the half-life of a radioactive element?
a) the time required for one-half of a given quantity of the element to decay b) the time required for all of the radioactive element to decay c) if you observe a radioactive element, it only decays half of the time and not the other d) a popular videogame
We learn, in Geology, that which of the following comes first?
a) the "Age of Mammals" b) dinosaur extinction c) the "Age of Aquarius" d) the creation of the Hawaiian islands
When did plants first colonize land?
a) about 2 billion years ago b) about 3.8 billion years ago c) about 440 million years ago d) yesterday
Relative dating methods are used to determine:
a) the age, in years, of a geological event b) the chronological sequence of geological events c) if two people will get along d) celebrity gossip
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