Geologic Time Scale
Fossils
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Name:
Date:
Class:
What’s a geologic lime scale?
____________________________________
The geologic time scale is broken into ___________________________ and
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5
A fossil is the naturally preserved
evidence of life.
are called~
A scientist who specializes in the study of
fossils, ancient life, and ancient
environments is called a(n)
________
and periods are divided into ________________________
Period
Which of the following is flQt a fossil?
A
B
C
D
A
B
C
D
a fly in amber
dinosaur footprints
imprint of a leaf
all of the above are fossils
2
6
By what process was
the fly pictured
here fossilized?
mineralogist
archaeologist
microbiologist
paleontologist
The broadest divisions
Eons are divided into ________________________ ,eras are divided into
Millions of
Years Ago
The Cenozoic Era
A paleontologist discovers a trilobite in a layer
of limestone. One hundred meters higher in
the rock record, a fossilized fish is found.
The principle of superposition leads the
paleontologist to conclude that
The Mesozoic Era
_______
A permineralization
B petrification
o preservation in hardened
tree sap (amber)
D trace fossilization
3
A
B
C
D
7
The original wood of these trees is
completely gone. By what process were
these trees fossilized?
A
B
C
D
permineralization
petrification
mummification
freezing
trilobites are small than fish
trilobites are older than fish
fish ate trilobites
trilobites and fish are
both seafood
In this rock sequence, a reptile
fossil is below the trilobite fossil
even though reptiles, such as
dinosaurs, are younger than
trilobites. Is it a reasonable
geological explanation to infer
that this rock sequence has been
turned upside down by dramatic
forces such as an earthquake or
some manmade disturbance?
Ayes
4
8
This is a picture of a dinosaur footprint.
Geologists call this a track. Fossils that
preserve the motion and activities of ancient
organisms are called
_______
A
B
C
D
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mummified fossils
molds and casts
trace fossils
trilobites
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101
The Paleozoic Era
Bno
Fossils of organisms that lived in a very specific
time period for a relatively short period of time are
called index fossils. How do paleontologists use
index fossils?
A make a mold to identify fossils of the same
shape
B follow a trail of footprints to lead to complete
skeletons in the rock
C estimate the date when that fossil and
surrounding rock were formed
D identify what that animal may have eaten
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