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CCMS: A Trip Through Geologic Time Flashcards | StudBud
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CCMS: A Trip Through Geologic Time
CCMS: A Trip Through Geologic Time
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CCMS
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
The raised fossils in this diagram are examples of....
trace fossils
carbon fossils
mold fossils
cast fossils
2
Plants became abundant during the ...
Devonian period
Silurian
Permian Period
Carboniferous
3
Sometimes layers of rock are overturned so that the
youngest
rock layer may appear on bottom
False
True
4
The gap in geologic record where some rock layers have been lost due to erosion.
gap
shear
faults
unconformity
5
When dissolved minerals replace the remains of an organism & then harden to form rock ______ .
amber
petrified
cast
mold
6
Based on the graph, how long it will take for the strontium-90 to decay completely?
28 years
112 years
84 years
56 years
7
The time it takes for 1/2 of the radioactive atoms in a sample to decay is the elements...
argon dating
absolute age
relative age
half-life
8
After Cambrian Explosion, that began the Paleozoic Era the many new forms of life that evolved
were single-celled
were invertebrates covered with scales or fur
lived on land
were invertebrates that lived in the sea
9
Potassium-40 is useful for dating very old rocks because it has a _______ of 1.3 billion years.
half-life
carbon-14 layer
10
Scientists can determine the absolute age of rocks using.....
the law of superposition
radioactive dating
fault lines
index fossils
11
The preserved remains of traces of organisms that lived in the past?
Fossils
Domains
Rock Layers
Rocks
12
Footprints & trails are examples of
Casts & Molds.
False (trace fossils)
True
13
Jawless fish were Earth's first ________, or animals with backbones.
land walking
invertebrates
vertebrates
aquatic creatures
14
Layer F is an igneous extrusion. How could a Geologist use layer F to infer the age of layer A?
F is above A making it younger
A comes before F in the alphabet so that makes it younger
they are the same age
A is below F making it younger
15
Which of the following first appeared during the Quaternary Period?
humans
bacteria
dinosaurs
plants
16
Geologists divide Earth's long history into smaller units that make up the
Geologic Time Scale.
False
True
17
Based on the graph, how much Strontium-90 would be present in 84 years?
25%
100%
50%
12.5%
18
What has the study of fossils allowed scientists to do?
analyze the chemical composition of sedimentary rocks
study ocean depths & temperatures
Predict future extinct animals
describe past environments & the history of life
19
A leaf falls in a lake, it's rapidly buried in sediment, most likely forming a _______ fossil
cast
preserved
carbon film
mold
20
During a _____ ______ event, many living things die out at once.
mas extinction
major walkout
hot summer
cold winter
21
The law of
deposition
helps geologists determine the relative age of a rock layer.
False (Superposition)
True
22
What is formation G called?
chocolate
rock candy
Extrusion
Intrusion
23
Would Strontium-90 be useful for dating very old rocks?
Yes
No
24
Based on the graph, what is the half-life of Strontium-90?
112 years
84 years
56 years
28 years
25
Fosils usually occur in
Metamorphic Rocks.
True
False (Sedimentary Rocks)
26
What is the correct arrangement of geologic time from broad to specific?
period, era, eon
eon, era, period
ear, period, eon
period, eon, era
27
How do layers C & D compare in age?
They are the same age
layer D is older than layer C
They are both very old
layer C is older than layer D
28
Earth's earliest atmosphere lacked which gas that is necessary for life as we know it today
argon
oxygen
carbon dioxide
nitrogen
29
Geologists use radioactive dating to .........
tell where one soil horizon ends & another one begins
tell the difference between molds & casts
determine the relative age of rocks
to determine the absolute age of rocks
30
The relative age of rock is.........
it's age based on the amount of Carbon-14 in it
it's age compared with the ages of other rocks
less than the age of the fossils the rocks contain
the number of years since the rock formed
