Geologic Timescale Review

These specialized fossils indicate to geologists the boundaries in geological time and determine the age of rocks.

• Index fossils

• Limestone fossils

• Amber fossils

• Cast fossils

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This chronological time chart is broken into different time chunks, the largest being the Eon, then Era, Period, and Epoch.

• Timeline

• Calendar

• Geological time scale

• Time chart

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In which time period are we currently living?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

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Jellyfish are one of the oldest species on Earth. In what time period did they first appear?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

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NGSS.MS-LS4-1

​ ​ (a)   is the type of dating that allows scientists to know the exact age of a fossil or rock.

• Absolute Dating

• Relative Dating

In what time period did Pangaea, the super continent, appear?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

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Dinosaurs, small mammals, and birds are found in this time period.

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

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Which fossil is the youngest?

• fossil A

• fossil B

• fossil C

• fossils A and B are the same age

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6. A branch of geology dealing with the arrangement of sedimentary rock layers or strata?

• Stratigraphy

• Geography

• Photography

• Biography

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Geologists assume the newest rock layers are on top of the older ones, unless some type of disturbance occurs, in known as …

• Law of Inclusions

• Law of Crosscutting

• Law of Conservation

• Law of Superposition

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NGSS.MS-ESS1-4