Geologic Time Scale Worksheet

Front

Precambrian, Paleozoic, Mesozoic, and Cenozoic all belong to:

Back

Eras

Front

What first appeared on Earth during the Triassic period? Options: Humans, Dinosaurs, Fish, Modern Mammals

Back

Dinosaurs

Front

Age of fish was during this era:

Back

Paleozoic

Front

Modern mammals appeared during this era:

Back

Cenozoic

Front

Age of reptiles was during this era: Cenozoic, Mesozoic, Paleozoic, Precambrian

Back

Mesozoic

Front

What were all extinct by the end of the Mesozoic Era?

Back

Dinosaurs

Front

______ have been on Earth for about 200,000 years. This is very short compared to how long dinosaurs lived on Earth. Options: Fish, Humans, Birds, Insects

Back

Humans

Front

The earliest part of Earth's history is called the:

Back

Precambrian

Front

Which division of the geologic time scale is the longest? Options: Eon, Period, Era, Epoch

Back

Eon

Front

Which of these groups of animals appeared on Earth most recently? Options: Reptiles, Amphibians, Mammals, Fish

Back

Mammals