Geologic Time Scale

The geologic time scale was developed using _________________ .

• Climate data

• Glacial grooves

• Changes in fossils

• Meteorite fragments

The Geologic time scale is subdivided into 4 groups. List them beginning with the largest.

• Eons, periods, epochs, eras

• Epochs, periods, eras, eons

• Eras, eons, periods, epochs

• Eons, eras, periods, epochs

Which geologic event occurred during the Mesozoic era?

• First homo-sapien appeared

• Dinosaurs roamed the land

• First fish evolved

• Molten surface

List the 4 time periods (eras) beginning with the most recent one.

• Precambrian, Mesozoic, Cenozoic, Paleozoic

• Precambrian, Paleozoic, Mesozoic, Cenozoic

• Paleozoic, Mesozoic, Precambrian, Cenozoic

• Cenozoic, Mesozoic, Paleozoic, Precambrian

During which era did Pangaea break up?

• Cambrian Era

• Cenozoic era

• Paleozoic era

• Mesozoic era

At the end of which era did the largest mass extinction occur, wiping out 95% of marine life and 70% of life on land?

• Cambrian

• Mesozoic

• Paleozoic

• Cenozoic

Which of the following will not make a fossil?

• Decomposed organic material

• Plant impressions (casts)

• Animal footprints

• Loose animal bones

The most common fossils in rocks of the last 500 million years are ____

• Vertebrate bones

• Vertebrate teeth

• Invertebrate shells

• Leaves

Which fossil type is formed when an organism's original material is preserved without significant change?

• Mold fossils

• Trace fossils

• True form fossils

• Cast fossils

Mold fossils differ from cast fossils in that molds represent:

• Filled-in replica of an organism

• The hollow impression left by an organism

• Traces of an organism’s activity

• The actual remains of the organism