Carbon Dating & Half-lives

Which is used in radioactive dating?

• Carbon-14

• Index fossils

• Hydrochloric acid

• Law of superposition

Tags

NGSS.HS-PS1-8

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

Tags

NGSS.HS-PS1-8

NGSS.HS-ESS1-5

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

Tags

NGSS.HS-ESS1-5

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

Tags

NGSS.HS-PS1-8

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

Tags

NGSS.HS-ESS1-6

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

Tags

NGSS.HS-PS1-8