Geological Timescale

Presentation

•

Science

•

8th Grade

•

Hard

James Gonzalez

FREE Resource

22 Slides • 19 Questions

Multiple Choice

The Law of Superposition states

younger rocks laers 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

Geologic Time Scales

Fossils

•Preserved remains or
traces of animals,
plants, and other
organisms from the
remote past

•Fossil Record – History
of life as documented by
all fossils, preserved in
sedimentary rock strata

•Provides a snapshot of
past events in Earth’s
geological history

What is a fossil record?

Type your answer here

Multiple Choice

Which is the youngest rock layer?

siltstone

conglomerate

mudstone

limestone

Multiple Choice

Which Rock Layer is the oldest?

Multiple Choice

Which Rock Layer is the youngest?

Multiple Choice

What does relative age tell us about a rock layer or fossil?

The age of one rock layer or fossil compared to another.

The relative age of a fossil determined by radiometric dating

Younger rock layers sit on top of older rock layers

Older rock layers sit on top of younger rock layers

Multiple Choice

Preserved remains of plants and animals from the remote past are called?

sedimentary rocks

radioactive dating

decayed organisms

fossils

Multiple Choice

What are fossils that are abundant, easily recognizable, short lived, and widespread called?

preserved fossils

index fossils

imprints

radioactive dating

Multiple Choice

Which fossil would make the best index fossil?

beetle

flower

frog

fish

Multiple Choice

What does absolute age tell us about a rock layer or fossil?

The 'exact' age of a fossil determined by radiometric dating

The relative age of a fossil determined by radiometric dating

Younger rock layers sit on top of older rock layers

Older rock layers sit on top of younger rock layers

Multiple Choice

The geologic time scale is a record of....

the history of fossils only

the history of rocks

the history of rock layers and fossils

geologist notes

Multiple Choice

What is the largest unit of time on the geologic time scale

era

eon

epoch

period

Multiple Choice

Paleontologists infer that the earth is approximately how many years old?

4.5 million years

450 billion years

4.5 billion years

450 million years

Multiple Choice

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

Precambrian

Paleozoic

Mesozoic

Cenozoic

Multiple Choice

In which time period are we currently living?

Precambrian Time

Paleozoic Era

Mesozoic Era

Cenozoic Era

Multiple Choice

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

Precambrian

Paleozioic

Mesozoic

Cenozoic

Multiple Choice

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

Precambrian

Paleozioic

Mesozoic

Cenozoic

Multiple Choice

Which era was the longest, taking up 88% of geologic time?

Precambrian

Paleozoic

Mesozoic

Cenozoic

Multiple Choice

The end of an era, and the end of life for groups of organisms, is called?

death

mass extinction

transition

turning point

Multiple Choice

The end of the Mesozoic Era was most likely caused by?

a meteor

too much oxygen

lowering sea levels

an ice age

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