Geologic Time Scale Test Review

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Fossilized dung or waste is called

The first period of the Mesozoic Era is called the

The age of an object in relation to the ages of other objects is

The division of geologic time that makes up 88% of Earth's history is called

The gradual development of new organism from preexisting organisms is called

The Precambrian rock record is difficult to interpret because

Scientists have most accurately determined the absolute ages of rock layers by

How many half-lifes would be necessary for a sample of parent isotopes to decay to the point that only 1/8 of the sample is composed of parent isotopes?