How many years of deposition are represented by a single varve?

The number of years cannot be measured.

Index fossils found in rock layers in different areas of the world indicate that the rock layers

formed during the same period of time.

formed during different periods of time.

A frozen organism does not decay because

most bacteria can’t survive freezing temperatures.

most bacteria survive freezing temperatures.

Organisms that formed index fossils

lived during short spans of geologic time.

lived during long spans of geologic time.

were destroyed by igneous rocks.

were destroyed by sedimentary rocks.

tree sap that fossilizes insects

dead bacteria that creates fossils

fossilized carbon films of animals

Why is radioactive decay used to determine the absolute age of rocks?

Radioactive decay happens at a relatively constant rate.

Radioactive decay cannot be used to determine the age of a rock.

Radioactive decay happens very quickly.

Radioactive decay does not happen at a constant rate.

How is radioactive decay used to determine the absolute age of rocks?

Parent isotopes are compared to daughter isotopes.

Isotopes of different compounds are compared.

Radioactive substances are compared to non-radioactive substances.

Daughter isotopes are compared to sister isotopes.

What is a gastrolith?

b. a stone that was inside a dinosaur

carbonized impressions of plants or fish.

carbonized isotopes of organic material.

carbonized bones of animals or fish.

The principle of uniformitarianism states that

current geologic processes can explain past processes.

geologic processes are uniform throughout the Earth.

past processes can explain the future of biological organisms.

geologic processes can explain the movement of Earth's orbit.

Which of the following are all ways that organisms can be fossilized?

amber, petrification, mummification, freezing

freezing, petrification, decay, amber

decay, petrification, mummification, amber

mummification, decay, petrification, freezing

Precambrian time consists of

the first three eons of Earth’s history.

the first eon of Earth’s history.

the last eon of Earth’s history.

4 billion years between the first eon and the last eon.

A geologic period is usually named for

the place where its characteristic fossils were first discovered.

the person who found the first fossils from the period.

the time in which the period occurred.

Which of the following accurately characterizes Precambrian rock?

It has clearly identifiable layers.

The mass extinction at the end of the Permian Period led to

abundant new life-forms in the Mesozoic and Cenozoic Eras.

fewer resources during the Mesozoic Era.

delayed evolution of new species in the Cenozoic Era.

little environmental change in the Mesozoic Era.

According to the impact hypothesis, dinosaurs became extinct when

an asteroid crashed into Earth.

the continents underwent great movement.

Earth’s climate became much warmer.

The Pleistocene Epoch was characterized by

b. the repeated advance and retreat of ice sheets.

The Precambrian rock record is difficult to interpret because

tectonic activity has altered the original order of rock layers.

very few rocks exist from Precambrian time.

Precambrian rock contains many fossils.

Precambrian rock contains many minerals.

On a geologic column, the oldest rocks

contain fossils of modern-day animals.

Scientists have most accurately determined the absolute ages of rock layers by

using radiometric dating methods.

factoring rates of sediment deposition.

Which of the following explains the concept of evolution brought about by geologic change?

When the seas retreated at the end of the Permian Period, trilobites became extinct.

Geologic changes have no effect on evolution.

The fossils found in the lower layers of the geologic column resemble modern-day animals.

Few fossils exist in Precambrian rocks.

What can a scientist assume about a rock layer that matches a similar layer in a geologic column?

The layers formed at about the same time.

The layers are from the same area.

The layers contain the same kind of rock.

The layers were found at about the same time.

Unit 6 Geohistory and Fossils

Authored by JORDAN BREIT

Science

12th Grade

6 covered

Used 11+ times

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66 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the choice that best completes the statement or answers the question. The principle that Earth's history can be explained by current geologic processes is

unconformity

uniformitarianism

superposition

evolution

Tags

6.2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the choice that best completes the statement or answers the question. Younger layers of undisturbed sedimentary rock are above older layers according to a.

the principle of uniformitarianism

the principle of sedimentarianism

the law of superposition

the angular unconformity

Tags

6.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the choice that best completes the statement or answers the question. The boundary between two sedimentary rock layers is called a(n)

crosscut plane

crosscut layer

bedding plane

bedding layer

Tags

6.2

MULTIPLE SELECT QUESTION

30 sec • 1 pt

The age of an object in relation to the ages of other objects is a.

absolute age

comparative age

relative age

relational age

Tags

6.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the choice that best completes the statement or answers the question. A fault or body of rock is younger than any other body of rock it cuts through according to the law of

crosscutting relationships

superposition

uniformitarianism

averages

Tags

6.2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The numeric age of an object is called a.

relational age

comparative age

relative age

absolute age

Tags

6.1

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Identify the choice that best completes the statement or answers the question. Carbon-14 is an isotope

formed by radioactive decay.

used to date objects less than 70,000 years old.

used to date objects over 6,000 years old.

that cannot be used to date objects.

Tags

6.2

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Unit 6 Geohistory and Fossils

Identify the choice that best completes the statement or answers the question. The principle that Earth's history can be explained by current geologic processes is

Identify the choice that best completes the statement or answers the question. Younger layers of undisturbed sedimentary rock are above older layers according to a.

Identify the choice that best completes the statement or answers the question. The boundary between two sedimentary rock layers is called a(n)

The age of an object in relation to the ages of other objects is a.

Identify the choice that best completes the statement or answers the question. A fault or body of rock is younger than any other body of rock it cuts through according to the law of

The numeric age of an object is called a.

Identify the choice that best completes the statement or answers the question. Carbon-14 is an isotope

How many years of deposition are represented by a single varve?

Index fossils found in rock layers in different areas of the world indicate that the rock layers

Almost all fossils are discovered in

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