Lab's Geologic Time Scale

the tool we use to organize Earth's events as they happened

• era

• law of superposition

• geologic time scale

• original horizontality

The Law of Superposition states

• Younger rocks layers are on top of older rock layers

• Fossils are found in sedimentary rocks

• Older rock layers are on top of younger rock layers

• Absolute age dating

Which period are we currently in?

• Quaternary

• Holocene

• Jurassic

• Tertiary

Which of the following periods occurred first (is the oldest)?

• Cretaceous

• Jurassic

• Triassic

• Permian

Which of the following is the most recent epoch (newest)?

• Pleistocene

• Paleocene

• Eocene

• Holocene

• Miocene

The Phanerozoic eon began about _______ years ago.

• 542 m.y.a.

• 248 m.y.a.

• 2500 m.y.a.

• 4500 m.y.a.

• 1 m.y.a

Which era is the longest?

• Cenozoic

• Cambrian

• Precambrian

• Phanerozoic

The largest expanse of time on the geologic time scale is the

• eon

• epoch

• era

• period

Which of these was not in the Mesozoic Era?

• Triassic Period

• Silurian Period

• Jurassic Period

• Cretaceous Period

What is the oldest organism on the geologic time scale?

• primitive horses

• flowering plants

• giant insects

• trilobites