Geologic Time Vocab Review

Front

Process of natural forces moving weathered rock and soil.

Back

erosion

Front

Erosion deposits weathered rock and soil.

Back

Deposition

Front

Geologic time is divided into three long periods called:

Back

eras

Front

Many living things become extinct at the same time

Back

mass extinction

Front

Smaller units of Geologic Time; Jurassic is a familiar one.

Back

period

Front

Index fossil resembling a cockroach

Back

Trilobite

Front

Longest Geologic Time period; only single-celled organisms.

Back

PreCambrian

Front

Current Geologic Time; Age of Mammals

Back

Cenozoic

Front

Geologic time period known as the Age of Reptiles; home to Dinosaurs.

Back

Mesozoic

Front

Geologic time period known as the Age of Fish; spined organisms first appeared.

Back

Paleozoic