How are rock layers arranged in the geologic column?
What does a scientist need to know in order to find out the absolute age of a rock?
What is amber?
Which of the following is an example of a trace fossil?
Which kind of temperatures will slow down an organism's rate of decay?
What does the rock and fossil record represent?
If a trilobite were buried by ocean sediment, it would leave a cavity, or a(n)
What process involves the comparison of rock layers with others in a sequence to determine its age?
A fossil used to date surrounding rock layers is called a(n)
To determine the most accurate and precice age of the Earth's oldest rocks, geologists would use
What do scientists think may have caused dinosaurs to become extinct?
What happens during radioactive decay?
How do geologists use the geologic time scale?
What can animal tracks tell about the animal that left them?
What can a scientist learn by studying the relationships between fossils?
Global climate change may have caused the extinction of which group of animals?
What process compares one rock layer with others in a sequence?
Molten rock that squeezes into existing rock and cools is called what?
Which of the following is not a measure of absolute dating?
What do scientists know about an undisturbed sequence of rocks?
Where are most fossils preserved?
As long as a sequence of rock layers is undisturbed, what can scientists know about it FOR CERTAIN?
How old would rock surrounding a Tropites fossil be?
During which eon were the earliest known rocks formed on Earth?
Which of the following can scientists NOT interpret by examining fossils?
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
According to the principle of ____________________, geologic process operate today as they did in the Earth's past.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
A trilobite was buried by ocean sediment, leaving a cavity, or ___________________.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
The process of ____________________ involves the comparison of one rock layer with others in a sequence to determine its age.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
The largest divisions of geologic time are called _______________.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
Erosion is a major cause of missing rock layers known as _______________________.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
Remains of organisms that often are preserved in sedimentary rock are called ____________________.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
Finding the age of a rock based on the ratio of parent material to daughter material is called ___________________.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
When an isotope is _______________, it stays in its original form.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
When an isotope is ________________, it is radioactive.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
The more _______________ material there is in a rock sample, the older the rock is.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
The ______________ era is known as the Age of Reptiles.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
The eon we live in now is the ____________________ eon.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
We live in the ______________ era, which began about 65 million years ago.
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cast mold disconformities relative dating unconformities uniformitarianism catastrophism epochs eons index fossils fossils radiometric dating radioactive decay isotope stable unstable daughter parent Phanerozoic Mesozoic Paleozoic Cenozoic Proterozoic
The ______________ era ended about 248 million years ago.
The pictures above show geologic changes. However, the pictures are out of order. Label the pictures with the letters A, B, C, D & E to show the correct geological sequence. The picture at the far left is to be labeled with the letter C. Record your answer with the letter sequence that correctly shows the geological sequence from left to right.
The process in which minerals replace tissues.
A preserved trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock.
A mark or cavity made in a sedimentary surface by a shell or other body.
A fossil from a specific time period.
A fossil formed by an animal's movement.
A mold filled with sediment.
The idea that geologic processes now are the same as in the past.
The idea that geologic change happens suddenly.
The study of past life.
A science that combines uniformitarianism and catastrophism.