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Unit 4 Test
Review for unit 4
| Question | Answer |
|---|---|
| How do you determine absolute age of a rock? What is the primary method? | Measuring radioactive decay of element isotopes |
| Each change in era is represented by what primary event? | The disappearance of organisms from the geologic record |
| What is the Theory of Uniformatarianism? | Geologic processes we see today were also at work in the past. |
| What does the relationship among rock layers tell geologists (think about James Hutton…) | They get a sense of the history of the area they are investigating. |
| Trilobites were originally found in what type of environment? | An environment, that at one time, was under water. |
| Is volcanic activity present more now, or in earth’s history? | Volcanic activity was more common in the past than it is today. |
| In what era did a real diversity of life show up? | Phanerozoic eon. |
| What are the ideal conditions needed for fossilization to occur? | rapid burial and hard body parts |
| When anazlyzing types of fossils found…what information do these fossils provide? | Evidence of the environment of the past in the area where the fossil was found |
| In an earlier unit, we learned about a certain theory (what is it?) and it explains why we find similar species on different continents…? | Theory of Continental Drift |
| Understand the “law of superposition” (What is it?) and how it is represented in a diagram. | This law refers to the idea that sediment is deposited from oldest to youngest. |
Created by:
jabb123
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