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PC Geo Time Fossils
PC Geologic Time and Fossils
| Question | Answer |
|---|---|
| The mineralized remains of organisms, showing how long-dead organisms lived and how their bodies were structured. | fossils |
| What is a bed or layer of sedimentary rock having approximately the same composition throughout? | rock strata |
| How old is the earth? | 4.6 Billion years old |
| The quality or state of having many different forms, types, ideas, etc. | diversity |
| Fossils are often found in sedimentary rock. In undisturbed sedimentary rock, where would the oldest fossils be found? | the bottom layer |
| The mineralized remains of organisms and the rock layers in which they are found, showing when and where long-dead organisms lived and how their bodies were structured | fossil record |
| System of chronological measurement that relates stratigraphy (study of rock layers) to time | geologic time scale |
| The formation of fossils as stone replaces decaying tissues | Petrification |
| Scientific law that states fossils located in deeper sediment layers are older than ones deposited in layers closer to the surface | Law of Superposition |
| The science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is undergoing. | geology |
| Fossils can usually be found in layers of | sedimentary rock |
| The study of rock layers | Stratigraphy |
| Which of the following can help to determine the age of a fossil? | Location of the fossil within the rock layers |
| The study of dinosaurs and other fossilized creatures | Paleontology |
| ____________ fossils are fossils that are formed not by the actual dead organism but by its activities while it was alive. Examples of trace fossils include animal tracks preserved in stone, petrified nests, burrows, dung, etc. | trace |
| _______________________fossils are formed when all or part of an organism is covered in a solid substance, such as ice or amber, that preserves the material trapped inside. | Inclusion |
| For a ______________ fossil to form, a dead organism must first be buried in sediment. Then, as the organism slowly decays, it leaves behind open spaces where minerals crystallize and fill in the exact shape of the decaying organism or part. | mold |
| The permanent disappearance of a species from Earth | extinction |
| Beds or layers of sedimentary rock having approximately the same composition throughout | rock strata |
| ________________ fossils are formed when part of an organism has been buried in sediment and slowly decayed. The dead organism creates an impression in the soft sediment. The sediment then hardens into solid stone, preserving the impression in stone. | cast |
| The arrangement of things in the order that they occurred | chronological order |
Created by:
Ms. Traynor-Grimes (Ms.TG)
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