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- 1. Multiple ChoiceIn 1897, a British scientist proposed that Earth was between 20 and 400 million years old. Based on radiometric dating, scientists now propose a different age for Earth. Based on the most current radiometric dating data, about how old is Earth? (You may use your geologic time scale.)40 billion years old20 billion years old4.6 billion years old4.6 million years old
- 2. Multiple ChoiceWhich of these choices is an example of the way a geologist would use relative dating?determining the minerals that make up rocksplacing rock layers in order of oldest to youngestclassifying rocks as igneous, sedimentary, or metamorphicusing radioactive isotopes to determine the exact age of rock samples
- 3. Multiple ChoiceA geologist is studying three layers of sedimentary rock in an area. The geologist records the relative ages of the rocks. The bottom layer is listed as the oldest. The top layer is listed as the youngest. What did the geologist use to determine the relative ages of the rocks?mineral contentradioactive decaythe law of superpositionthe principle of unconformity
- 4. Multiple ChoiceWhich of the following provides the most useful information for determining the absolute ages of rocks?Half life of radioactive elementsRelative positions of rock layersMeasurements of fossil bonesChemical analysis of crystals
- 5. Multiple ChoiceThe idea that the same geologic processes that slowly shape Earth today have always shaped Earth.
Change Theory
Uniformitarianism
Catastrophism
Predictability
- 6. Multiple ChoiceThe law of superposition states:Energy isn't created or destroyed, it is simply changes formEach rock layer is older than the layer above itFossils are only as old as the rock layer they are found inIntrusions are younger than the rock layer they are found in
- 7. Multiple ChoiceAbsolute age is defined as:The age of rock determined by radiometric dating.The age of rock based on living animals.The age of rock based on its location.The age of rock determined by carbon dating.
- 8. Multiple ChoiceThe age of a rock compared to the ages of other rocks is the rock'sabsolute agegeologic agesedimentary agerelative age
- 9. Multiple Choice
Which of the following correctly lists the layers in order from oldest to youngest?A, B, C, D, EE, B, C, D, AE, D, C, B, AC, B, A, D, E - 10. Multiple ChoiceWhich rock layer or intrusion is the youngest?ABCD
- 11. Multiple ChoiceTrilobites are good index fossils because.... (pick the best answer).abundant, largeabundant, widespread geographically, and only lived a short timeonly lived for a short time periodwere large
carbonized - 12. Multiple ChoiceLetter "F" is a....inclusionintrusionfaultunconformity
- 13. Multiple ChoiceTrue or False: The geologic record can help scientists to determine past environment and climate conditions.TrueFalseMaybeSometimes
- 14. Multiple ChoiceWhich fossil would make a good index fossil?ABCD
- 15. Multiple ChoiceTrue or False: An intrusion and fault are ALWAYS younger than the rock they cut through.True: because the rock layers must be there initially - the fault or intrusion cannot occur in nothing.False: they are always younger.
- 16. Multiple ChoiceAccording to the law of superposition, which layer is the youngest?ABC
- 17. Multiple ChoiceWhich rock layer was formed most recently?PermianCarboniferousSilurianCambrian
- 18. Multiple ChoiceAn ordered arrangement of rock layers that is based on the relative ages of the rocksSuperpositionUnconformityLayeredGeologic Column
- 19. Multiple ChoiceWhat are the relative ages of the features in order from oldest to youngest?Limestone, Basalt, Fault, SiltstoneSiltstone, Fault, Basalt, LimestoneLimestone, Fault, Basalt, SiltstoneLimestone, Siltstone, Fault, Basalt
- 20. Multiple ChoiceWhat percent of carbon-14 would be left after 11,460 years? (2 half lives)100%75%50%25%
- Answer choicesTagsAnswer choicesTags