| 1) | Which two geologic principles are most important in relative dating of rocks? | 
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| 2) | What is uniformitarianism? | 
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| 3) | How would you apply the principle of uniformitarianism in interpreting the origins of a sedimentary rock? | 
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| 4) | What types of depositional environments best display the principles of superposition? | 
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| 5) | What is a facies? | 
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| 6) | What is "Walther's Law"? | 
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|  | A) What does it does it predict about facies relationships, why? | 
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| 7) | List three organisms that could produce environment-independent fossils | 
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| 8) | Why is the Hadean not considered a part of the geologic time scale | 
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| 9) | What types of fossils are found in the Cryptozoic Eon | 
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| 10) | Match the following fossils with the geologic time period when they occur | 
	|  | | A. hominid bones B. trilobites
 C. first land plant fossils
 D. first mammal fossils
 E. dinosaur bones
 
 | 1. Paleozoic 2. Cretaceous
 3. Triassic
 4. Pleistocene
 5. Silurian
 
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| 11) | List the periods present in each of the following | 
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|  | A) Paleozoic | 
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	|  | B) Mesozoic | 
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	|  | C) Cenozoic | 
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| 12) | What assumptions were made in determining the age of the earth based on salt concentration of the oceans? | 
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| 13) | Lord Kelvin suggested the age of the earth was relatively young. | 
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|  | A) What evidence did he use? What information was he missing? | 
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| 14) | Why is Carbon-14 not used to age date dinosaur bones? | 
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| 15) | What is a half-life? | 
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| 16) | What assumptions were made in determining the age of the earth based on salt concentration of the oceans? | 
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| 17) | What pitfalls should you be aware of in using fossil clams to subdivide geologic time? | 
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