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Paleontology
6th Grade Probe Science
| Question | Answer |
|---|---|
| What is a fossil? | The preserved remains or traces of living things. |
| What is paleontology? | The study of prehistoric life through the use of fossils. |
| What is a paleontologist? | A person who studies prehistoric life through fossils. |
| What can become a fossil? | Any living thing. |
| What is petrification? | The process which turns bones to rock. |
| Which parts of the organism usually fossilize? | The hard parts such as the bones and teeth. |
| What type of rock are fossils usually found in? | Sedimentary |
| What types of fossils are found in rocks? | trace fossils, cast fossils, mold fossils, petrified fossils and carbon hair. |
| What is a trace fossil? | A fossil that shows evidence of an organism's actions such as a footprint. |
| How can organisms be preserved with all their parts? | Tar, ice, or amber |
| What can scientist learn from fossils? | How life has changed on earth How Earth's surface has changed How Earth's environment and climate has changed |
| How can fossils show how life has changed? | There are fossils of organisms that do not exist today; organisms are becoming more complex |
| How can fossils show us how the Earth's surface has changed? | There are fossils that show us where volcanos have erupted, earthquakes have crumbled mountains, water has receded, and erosion has worn away layers. |
| How can fossil's show us how the Earth's environment has changed? | There are fossils that show that some arctic climates used to be tropical, and some dry climates used to be wet, etc. |
| What is the Law of Superposition? | States that the older layer of sediment is usually under the younger layer of sediment. |
| What is extrusion? | When lava has broken through the Earth's surface and hardened over the top crust layer forming a new layer of igneous rock. |
| What is intrusion? | When magma cuts through layers of the crust but does not break through the surface. |
| Which is older an intrusion or the layers surrounding it? | The layers surrounding the intrusion are older. |
| Which is older an extrusion or the layers below it? | The layers below the extrusion is older. |
| What is unconformity? | Where new rock layers meet much older layers (there are missing layers). |
| What is a gap in the Geologic Record? | An unconformity |
| What is the Law of Horizontality? | As sediments settle out of water they are deposited in horizontal layers. |
| What is the Law of Uniformitarianism? | Events that occur today also occurred in the past. |
| What is absolute dating? | When scientist find the actual age of the rock by finding how many years since the rock was formed. |
| How do scientist find the absolute age of a rock? | radiometric or radioactive dating |
| What is relative dating? | When scientist find the age of the rock by comparing the age to other rocks. |
| How do scientist find the relative age of a rock? | Using index fossils |
| How old is the earth? | 4.6 billion years old |
| What is the Geologic time scale? | Life and events in Earth's history. |
| What are index fossils? | Fossils which were only alive during a short period of time. |
| Why does the Geographic time scale not use years or centuries? | Because the amount of time between each event and the amount of time each event occurred is too large. |
Created by:
WilliamHall
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