Absolute Dating Answers

Use the drop-down menus to select the correct answers to complete the paragraph. The building blocks of matter are called . A substance made up of the same kind of atoms is called a(n) . elements lose particles. This makes them .

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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.

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.

Which statements describe the image? Check all that apply.

Use the drop-down menus to complete the paragraph. 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 decay is for each element, geologists can compare the amounts of stable and unstable elements to determine how much of the elements have formed over time.

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

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✔ unstablebalanced stable unbalanced

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changing slow ✔ constant

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radioactive basic ✔ stable