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Unit 1 Radiometric Dating

Comprehension Check Up

1. Why does the author mention a paleontologist?

(A) In order to assign credit for the development of radiometric dating
(B) In order to suggest that radiometric dating is most useful in paleontology
(C) In order to provide a concrete example of how radiometric dating is used
(D) In order to demonstrate how radiometric dating has revolutionized science

2. The phrase in the One of the most productive passage refers to

(A) methodologies (B) scientists
(C) timelines (D) rock structures

3. Based on the information in paragraph 2, isotopes can best be defined as

(A) atoms with specific ratios in nature
(B) atoms which degenerate into more stable forms
(C) atoms with predictable characteristics
(D) atoms with an easily measured mass

4. According to paragraph 2, in order to use an isotope for radiometric dating, a scientist must
know all of the following EXCEPT

(A) the current proportion of isotopes (B) the original proportion of isotopes
(C) the atomic weights of isotopes (D) the rates of radioactive decay

5. According to paragraph 3, what initiates changes in the ratio of carbon-14 and carbon-12
atoms in a sample?

(A) digestion (B) respiration (C) radiation (D) death

6. The word intrinsic in the passage is closest in meaning to

(A) essential (B) optional (C) separate (D) voluntary

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