Question 1

Which type of microfossils are organic walled cysts of planktonic algae primarily used in relative dating?

Accepted Answer

A)  acritarchs and dinoflagellates 
B)  coccoliths and formaminifera 
C)  diatoms and radiolaria 
D)  conodonts 
A)  acritarchs and dinoflagellates 
B)  coccoliths and formaminifera 
C)  diatoms and radiolaria 
D)  conodonts

Question 2

Why are the successive periods and epochs of the geologic time scale of unequal lengths?

Accepted Answer

A)  The periods and epochs are based on the duration of unique environments like basins, or events in earth history like extinctions, and orogenies which happen intermittently. 
B)  The passage of time has been speeding up and the length of the day is variable. 
C)  They were originally all of equal duration but most of them got eroded and are full of unconformities. 
D)  It is based on evolution and some creatures are slow learners. 
A)  The periods and epochs are based on the duration of unique environments like basins, or events in earth history like extinctions, and orogenies which happen intermittently. 
B)  The passage of time has been speeding up and the length of the day is variable. 
C)  They were originally all of equal duration but most of them got eroded and are full of unconformities. 
D)  It is based on evolution and some creatures are slow learners.

Question 3

The ratio of parent to daughter isotopes in a radioactive decay process is 0.40. How many half- lives have elapsed since the material was 100% parent atoms?

Accepted Answer

A)  3 
C)  2- 3 
D)  1- 2 
A)  3 
C)  2- 3 
D)  1- 2

Question 4

Which of the following does not have at least one, very long- lived, natural, radioactive isotope?

Accepted Answer

A)  Ca; calcium 
B)  Rb; rubidium 
C)  K, potassium 
D)  Th; thorium 
A)  Ca; calcium 
B)  Rb; rubidium 
C)  K, potassium 
D)  Th; thorium

Question 5

Working on fossiliferous strata in the mountains of western Italy,____ was first to work out____which is the fundamental way geologists know which bed is older in any sedimentary
sequence

Accepted Answer

A)  Charles Lyell, the sequence of orogenies 
B)  James Hutton, the principle of uniformitarianism 
C)  Nicolaus Steno, the law of superposition 
D)  William Smith, the principle of fossil succession 
A)  Charles Lyell, the sequence of orogenies 
B)  James Hutton, the principle of uniformitarianism 
C)  Nicolaus Steno, the law of superposition 
D)  William Smith, the principle of fossil succession

Question 6

While the Precambrian represents 88% of Earth's history, it is not divided into periods or epochs like the Phanerozoic because there ___________.

Accepted Answer

A)  were no multi- cellular organisms nor hard- bodied fauna to leave much of a fossil record 
B)  are few resources in Precambrian rocks and few geologists take an interest in them 
C)  are few remaining Precambrian rocks to correlate or divide due to active tectonics 
D)  are no Precambrian sedimentary rocks to use for internal divisions 
A)  were no multi- cellular organisms nor hard- bodied fauna to leave much of a fossil record 
B)  are few resources in Precambrian rocks and few geologists take an interest in them 
C)  are few remaining Precambrian rocks to correlate or divide due to active tectonics 
D)  are no Precambrian sedimentary rocks to use for internal divisions

Which type of microfossils are organic walled cysts of planktonic algae primarily used in relative dating?

Why are the successive periods and epochs of the geologic time scale of unequal lengths?

The ratio of parent to daughter isotopes in a radioactive decay process is 0.40. How many half- lives have elapsed since the material was 100% parent atoms?

Which of the following does not have at least one, very long- lived, natural, radioactive isotope?

Working on fossiliferous strata in the mountains of western Italy, was first to work outwhich is the fundamental way geologists know which bed is older in any sedimentary sequence

While the Precambrian represents 88% of Earth's history, it is not divided into periods or epochs like the Phanerozoic because there ___________.

An Introduction to Geology and Plate Tectonics

Minerals: the Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earths Interior

The Ocean Floor

Plate Tectonics: the Framework for Modern Geology

Mountain Building and Continental Frameworks

Mass Wasting: the Work of Gravity

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Mineral and Energy Resources

Filters

Exam 19: Shorelines

Which type of microfossils are organic walled cysts of planktonic algae primarily used in relative dating?

Why are the successive periods and epochs of the geologic time scale of unequal lengths?

The ratio of parent to daughter isotopes in a radioactive decay process is 0.40. How many half- lives have elapsed since the material was 100% parent atoms?

Which of the following does not have at least one, very long- lived, natural, radioactive isotope?

Working on fossiliferous strata in the mountains of western Italy,____ was first to work out____which is the fundamental way geologists know which bed is older in any sedimentary sequence

While the Precambrian represents 88% of Earth's history, it is not divided into periods or epochs like the Phanerozoic because there ___________.

An Introduction to Geology and Plate Tectonics

Minerals: the Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earths Interior

The Ocean Floor

Plate Tectonics: the Framework for Modern Geology

Mountain Building and Continental Frameworks

Mass Wasting: the Work of Gravity

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Mineral and Energy Resources

Filters

Working on fossiliferous strata in the mountains of western Italy, was first to work outwhich is the fundamental way geologists know which bed is older in any sedimentary sequence