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WorksheetsGeologic Time
Total questions: 21
Worksheet time: 21mins
The earth is ______________of years old
Hundreds
Millions
Billions
Trillions
What era did the formation of the earth occur?
Paleozoic
Precambrian
Cenozoic
Cambrian
How old do Paleontologists believe the Earth is?
2019 years old
3.6 billion years old
4.6 billion years old
4.6 million years old
What type of event usually marks the end of an Era
A Mass Extinction
A Quinceanera
An earthquake
A Volcanic Eruption
Which era is the most recent, the one that we are currently in?
Mesozoic
Paleozoic
Cenozoic
Precambrian
Scientists chose where units of geologic time began and ended based on the appearance or disappearance of life.
true
false
The dinosaurs and reptiles were dominant in which Era?
Precambrian
Mesozoic
Paleozoic
Cenozoic
when minerals replace the remains and they become rock; things like wood.
Petrified
Mold
Cast
Index
Trace Fossil
when the shell remains and the contents dissolve
Petrified
Mold
Cast
Index
Trace Fossil
when the mold becomes filled with minerals that are not a part of the original organism.
Petrified
Mold
Cast
Index
Trace Fossil
a fossil found in a narrow time range but widely distributed around the earth; used to date rock layers.
Petrified
Mold
Cast
Index
Trace Fossil
Analyze the layers of undisturbed sedimentary rock. Which layer of sedimentary rock is oldest?
Q
R
S
T
U
