Absolute Dating

Question 1

Use the drop-down menus to complete the paragraph.

Revolt · Accepted Answer

Geologists determine absolute age by comparing the amounts of radioactive and nonradioactive elements in rock. The radioactive, or , elements decay into nonradioactive elements. Because this rate of d: igneous; Geologists determine absolute age by comparing the amounts of radioactive and nonradioactive elements in rock. The radioactive, or , elements decay into nonradioactive elements. Because this rate of d: unstable; Geologists determine absolute age by comparing the amounts of radioactive and nonradioactive elements in rock. The radioactive, or , elements decay into nonradioactive elements. Because this rate of d: constant; Geologists determine absolute age by comparing the amounts of radioactive and nonradioactive elements in rock. The radioactive, or , elements decay into nonradioactive elements. Because this rate of d: stable

Question 2

Use the drop-down menus to select the correct answers to complete the paragraph.

Revolt · Accepted Answer

C: ✔ atoms

Question 3

Which statements about radioactive decay are true? Check all that apply.Most elements are unstable.Radioactive decay happens when one kind of atom becomes another kind.Radioactive elements occur in nature.All elements have the same rate of decay.Carbon-14 decays into nitrogen-14.

Revolt · Accepted Answer

B: Radioactive decay happens when one kind of atom becomes another kind.; C: Radioactive elements occur in nature.; E: Carbon-14 decays into nitrogen-14.

Question 4

A scientist is studying a radioactive element that has a half-life of 63 years. Choose the correct answers from the drop-down menus to complete each statement about the element. It will take years for half of the sample to decay. In 189 years, of the sample will be left. Scientists can figure out how old a sample is by multiplying the by the length of the half-life.

Revolt · Accepted Answer

B: 63

Question 5

Which statements describe the image? Check all that apply.

Revolt · Accepted Answer

C: The process works only with organic matter.; D: The element has a half-life of 5,730 years.

Question 6

Use the drop-down menus to complete the paragraph.

Revolt · Accepted Answer

A: ✔ igneous

Question 7

Which object would a geologist date using carbon-14 dating?

Revolt · Accepted Answer

B: a woolly mammoth fossil that existed 15,000 years ago

Question 8

How would a geologist use absolute dating to determine the age of sedimentary layers?

Revolt · Accepted Answer

B: by dating the age of intrusions and extrusions near a sedimentary rock layer

Question 9

particle✔ elementmaterial

Revolt · Accepted Answer

B: ✔ element

Question 10

one-half✔ one-eighthone-sixteenth

Revolt · Accepted Answer

B: one-eighth

Absolute Dating Answers

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