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Which characteristics of carbon-14 dating helps scientists determine the approximate time a species became extinct?
Carbon-14 decreases at a constant rate over time.
relative dating
They contain evidence showing changes in the atmospheric composition over time.
Dinosaurs lived on Earth before the mammals.
the index fossils in the area of the bones
Igneous
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Radioactive dating
Which method provides the most accurate age of a rock sample?
Carbon-14 decreases at a constant rate over time.
relative dating
They contain evidence showing changes in the atmospheric composition over time.
Dinosaurs lived on Earth before the mammals.
the index fossils in the area of the bones
Igneous
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Radioactive dating
A scientist finds the bones of a dinosaur. What could help the scientist determine the approximate age of the dinosaur bones?
Carbon-14 decreases at a constant rate over time.
relative dating
They contain evidence showing changes in the atmospheric composition over time.
Dinosaurs lived on Earth before the mammals.
the index fossils in the area of the bones
Igneous
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Radioactive dating
Which statement best describes the Law of Superposition?
Carbon-14 decreases at a constant rate over time.
relative dating
They contain evidence showing changes in the atmospheric composition over time.
Dinosaurs lived on Earth before the mammals.
the index fossils in the area of the bones
Igneous
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Radioactive dating
Which best describes how ice cores are important to the study of geologic history?
Carbon-14 decreases at a constant rate over time.
relative dating
They contain evidence showing changes in the atmospheric composition over time.
Dinosaurs lived on Earth before the mammals.
the index fossils in the area of the bones
Igneous
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Radioactive dating
Scientists find dinosaur fossils in the bottom rock layers of a cliff and mammal fossils in the middle rock layer of the cliff. Which could best be concluded from this evidence?
Carbon-14 decreases at a constant rate over time.
relative dating
They contain evidence showing changes in the atmospheric composition over time.
Dinosaurs lived on Earth before the mammals.
the index fossils in the area of the bones
Igneous
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Radioactive dating
Which is a process that allows scientists to compare rock layers with others in a sequence to determine their age?
Carbon-14 decreases at a constant rate over time.
relative dating
They contain evidence showing changes in the atmospheric composition over time.
Dinosaurs lived on Earth before the mammals.
the index fossils in the area of the bones
Igneous
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Radioactive dating
Which type of rock forms from the cooling of lava?
Carbon-14 decreases at a constant rate over time.
relative dating
They contain evidence showing changes in the atmospheric composition over time.
Dinosaurs lived on Earth before the mammals.
the index fossils in the area of the bones
Igneous
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Radioactive dating
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