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WorksheetsCarbon Dating & Half-lives
Total questions: 10
Worksheet time: 5mins
Which is used in radioactive dating?
Carbon-14
Index fossils
Hydrochloric acid
Law of superposition
Through relative dating, a geologist finds a fossil that is approximately 10,000 years old. Which radioactive element would geologist use to accurately calculate the fossils age?
Gallium 67 with a half life of 78 hours
Carbon-14 with a half-life of 5,700 years
Plutonium-238 with a half-life of 88 years
Iodine-129 with a half-life of 16 million years
Which method would be best for scientist to use to determine the absolute age of a Precambrian igneous rock.
index fossil
law of superposition
radiometric dating
law of original horizontality
Which can be used to find the exact age of a rock specimen?
ice cores
radioactive dating
index fossils
trace fossils
Which characteristic of Carbon-14 dating helps scientist determine the approximate time a species became extinct.
Carbon-14 is not present in more recent fossils.
Carbon-14 increases at a constant rate over time
Carbon-14 decreases at a constant rate over time
Carbon-14 is not present in fossils
Which method is most accurate in determining the age of a rock sample.
Superposition
Relative Dating
Radioactive Dating
Trace fossils
The radioactive isotope content of a rock can be used to identify which property of the rock?
the total mass of a rock
the rate at which the rock formed
types of fossils that the rock contains
the amount of time that has passed since the rock formed
Which process would be most effective in determining the age of fossils embedded in rock?
relative dating
absolute dating
index fossils
core samples
Which is the most accurate method scientist use to estimate Earth's age?
Relativism
Superposition
Relative Dating
Radioactive Dating
Which best explains the use of radioactive dating?
determine the presence of index fossils
determine the relative age of a rock layer
determine the absolute age of a rock layer
determine changes in the surface of the Earth
