1912389
Description
Flashcards by irenepapers, updated more than 1 year ago
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Created by irenepapers
almost 10 years ago
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| Question | Answer |
| Fossil | preserved remains, traces, imprints of organisms that lived a long time ago |
| Carbon Film | organisms buried in sediments that slowly decay while being squeezed and slow-cooked |
| Cast | when a mold fills with sediment, and forms the shape of the original animals |
| Mold | when only the shape of the animal is preserved in hardened rock after the soft parts decay |
| Trace Fossil | evidence of the organism’s existence; not the actual organism |
| Index Fossil | fossils whose age has already been determined by scientists |
| Original Remains | when actual body parts of the organism is sealed in tar, amber, or ice |
| Relative Dating | the science of determining the relative order of past events without necessarily determining their absolute age |
| Relative Age | tells how old a rock layer is compared to another layer; not the exact age |
| Principle of Superposition | in undisturbed rock layers, the oldest rock is on the bottom and youngest on the top. |
| Unconformity | gaps in rock sequences or areas where erosion of the rocks have occurred |
| What are conditions that increases fossil formation? | The conditions that increases fossil formation is when the fossil is buried, protected from decay, or from the hard body parts. |
| Rocks in different locations formed at the same time if? | Rocks in different locations are formed at the same time if there is the same type of rock, the same fossil found in rock, or a similar sequence. |
| What are the types of unconformities? | The types of unconformities are disconformities, nonconformities, and angular unconformities. |
| Disconformity | |
| Nonconformity | |
| Angular Unconformity | |
| How can you apply the Principle of Superposition? | I can apply the Principle of Superposition by showing that the sedimentary layers are deposited in a time sequence, with the oldest on the bottom and the youngest on the top. |
| Faults are what than the layers they cut through? | Faults are younger than the layers they cut through. |
| An igneous intrusion is what than the laters they cut through? | Igneous intrusion is younger than layers they cut through. |
| Erosion surfaces indicate? | Erosion surfaces indicate unconformities. |
| Horizontal Layers are? | Horizontal layers are undisturbed. |
| How many years in one half life? | 5,730 years |
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