Chapter 5 Test Review
Instructions: Click on the button to see if your answer is correct or not. I recommend keeping track of how many you get correct on your first try.
The fault is older than all of the layers it cuts across.
The fault is younger than all the layers it cuts across.
The fault is the same age as the bottom layer it cuts across.
The fault is the same age as the top layer it cuts across.
darken with age.
can be sampled easily.
are older the the surrounding rock.
deposit quickly over a wide area.
Both strongly resist chemical weathering.
Both often serve as geologic time markers.
Both can usually be dated with radiocarbon.
Both normally occur in non-sedimentary rocks.
compare the colors of the two layers
compare the thickness of the two layers
compare the index fossils in the two layers
compare the size of sand particles of the two layers
joints in the rock layers.
overturning of rock layers.
4.6 x 106 years
4.6 x 107 years
4.6 x 108 years
4.6 x 109 years
stay the same.
Most became extinct.
Most lived on the land.
Most were preserved in metamorphic rock.
Most appeared during the Cambrian Period.
many life-forms have become extinct.
faults are older than the rock in which they are found.
part of the geologic record has been destroyed.
metamorphic rocks have formed from sedimentary rocks.
The ratio of decay products to to radioactive substances remains constant in rocks.
The half-lives of radioactive substances are short.
Samples of radioactive substances are easy to collect from rocks.
Radioactive substances undergo decay at a predictable rate.
surviving environmental changes.
The species had hard parts, such as shells, bones, or teeth.
The species lived over a large geographic area.
The species lived over a very long geologic time scale.
The species lived over a small geologic time scale.
Middle Archean Era
Early Proterozoic Era
Early Jurassic Period
Late Cretaceous Period
The Green represents the remaining isotope.
The Blue represents the amount of decay-product.
If the half-life of the radioactive material is 2,000 years, what is the age of the sample represented by the diagram?
The horse evolved due to the influence of humans.
The horse evolved from a complex life-form to a simpler life-form.
The horse evolved into a life-form better able to survive.
The horse evolved from larger ancestors without forelimbs.
Yes, all of the time.
No, dinosaurs did not bother with people because they could not catch people, and if they did, the people were too small to fill them up.
No, dinosaurs did not like the taste of people.
No, dinosaurs and people did not live at the same time.
The age of an igneous intrusion is 50 million years. What is the most probable age of the rock immediately surrounding the intrusion?
10 million years
25 million years
40 million years
60 million years
The diagram below represents bedrock of different ages beneath a location in New York State.
Assuming that the rock layers have not bee overturned and that no unconformity exists, at which location is this bedrock found?
Fossils would most likely be found in a sample of
During which geologic time period did the earliest reptiles and great coal-forming forests exist?
Which radioactive isotope is most useful for determining the age of mastodont bones found in late Pleistocene sediment?
The half-life of a radioactive substance is mainly controlled by the
amount of the substance.
composition of the substance.
pressure acting on the substance.
temperature of the substance.
A bone sample contains only 1/4 of its original radioactive C14 content. How old is the bone sample?
1 C14 half-life
2 C14 half-lives
3 C14 half-lives
4 C14 half-lives
Which two elements are most useful for the radioactive dating of recent organic remains?
C14 and N14
K40 and Ca40
U238 and Pb206
Rb87 and Sr87
The absolute age of a rock is the approximate number of years ago that the rock formed. The absolute age of an igneous rock can best be determined by
comparing the amounts of decayed and undecayed radioactive isotopes in the rock.
comparing the sizes of the crystals found in the upper and lower parts of the rock.
examining the rock's relative position in a rock outcrop.
examining the environment in which the rock is found.
Approximately how long ago did the first dinosaurs appear on earth?
66 million years ago
187 million years ago
230 million years ago
374 million years ago
Which sequence of New York State index fossils shows the order in which the organism appeared on Earth?
What is the name of the New York State Fossil?
Base your answers to questions 38 through 41 on the geologic cross section below. Overturning has not occurred.
Which statement can be said of the dike and sills shown in the cross section?
These are igneous intrusions.
These are igneous extrusions.
These are sedimentary rock.
These were first to form in this landscape.
Which rock type is the oldest?
Which feature is represented by symbol along the edges of the dike and sills?
contact metamorphic rock
a glacial moraine
Which statement correctly describes an age relationship in the geologic cross section below?
The top layer of sandstone is older than the top layer of shale.
The conglomerate is younger than the bottom layer of sandstone.
The granite is older than the bottom layer of sandstone sandstone.
The granite is younger than the top layer of sandstone sandstone.