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Chapter 6 - A Trip Through Geological Time Flashcards | StudBud
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Chapter 6 - A Trip Through Geological Time
Chapter 6 - A Trip Through Geological Time
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Review for the upcoming tests
Flashcards
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Questions
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Answers
1
Interpret the chart below and tell what period below begins the era of mammals
c. Cenozoic Era
b. Mesozoic Era
a. Paleozoic Era
2
Geologists use radioactive dating to
b. tell the difference between molds and casts.
a. determine the relative ages of rock layers
c.tell where one soil horizon ends and the next one begins.
d. determine the absolute age of rocks
3
Earth’s earliest atmosphere lacked which gas that is necessary for life as we know it to exist today?
carbon dioxide
nitrogen
oxygen
argon
4
What are fossils?
b. the preserved remains or traces of organisms that lived in the past
c.molds and casts of organisms that live today
d.footprints or burrows of small animals that live today
a.drawings of ancient animals and other organisms
5
A __________fossil forms when dissolved minerals replace the remains of an organism and then harden to form rock.
mold/cast
carbon film
trace
petrified
6
The time it takes for half of the radioactive atoms in a sample of a radioactive element to decay is the element’s
absolute age
potassium argon
relative age
half life
7
In radioactive dating scientists are figuring out what?
b. The amount of nitrogen left on a rock
a. The amount of radioactivity that is left in a rock
c. The amount of potassium left in a rock
8
The following is an example of a
trace fossil
petrified fossil
mold/cast fossil
carbon film fossil
9
The best test to use for the most ancient rocks it can test rocks 1.3 billion years old is
a. Carbon 14 dating
b. Potassium-40
c. Nitranium 6
10
A comet is a....
c. the beginning of a shooting star in the solar system
a. Ball of fire made up of copper and magnesium
b. Ball of dust made up of gas and ice that orbits the sun
11
The relative age of rock is...
c.the number of years since the rock formed.
b. less than the age of the fossils the rock contains.
d its age based on how much carbon-14 the rock contains.
a.its age compared with the ages of other rocks.
12
the following is an example of..
petrified fossil
caerbon film fossil
trace fossil
cast/mold fossil
13
The time it takes for half of the radioactive atoms in a sample of a radioactive element to decay is the element’s
absolute age
relative age
half life
14
The following is an example of
uncomformity
extrusion
folding
instrusion
15
Analyze the chart below. Tell what era the first and last dinosaurs were from
d. The Cambrian period
b. The Mesozoic era
c. The Paleozoic era
a. The Permian period
16
What has the study of fossils allowed scientists to do?
a. analyze the chemical composition of sedimentary rocks
c.study present ocean temperatures at different depths
d.predict which organisms will become extinct in the future
b.describe past environments and the history of life
17
A gap in the geologic record where some rock layers have been lost because of erosion is called a
unconformity
conformity
subform
extrusion
18
The following is an example of a
trace fossil
petrified fossils
mold/cast fossil
carbon film fossil
19
When do they use potassium argon dating?
a. In dating rocks that are 1 million years old
d. They don't use it for dating ancient rocks ever
c. In dating fossils that are 1.3 billion years old
b. In dating fossils that half a half life of 5,730 years old
20
The following is an example of..
mold/cast fossil
carbon film fossil
petrified fossil
trace fossil
21
17. Using the chart between what two dates would I find a trilobite?
d. 410-360
a. 320-390
b. 570-245
c. 570-500
22
Analyze the Image below. Looking at the example below letter G is an example of
intrusion
conformity
non conformity
extrusion
23
The atmosphere was formed by Volcanic eruptions and colliding comets that
c. added protons and neurons to form nucleic bonds
b.added carbon dioxide, water vapor, nitrogen and other gases
a. added minerals, potassium, calcium and other elements
24
In photosynthesis oxygen is released. As this happened the earth formed an ozone layer which
a. Protects and shields the earth from ultraviolet rays
b. deflects the atmosphere by making clouds
c. Keeps the plaints and animals from evolving
25
In the Paleozoic Era, the many new forms of life that evolved
b.were invertebrates that lived in the sea.
both a and b
a. lived on land such as reptiles
