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chapter 6 vocab
changes over time
| Term | Definition |
|---|---|
| Natural Selection | The process by which individuals are better adapted to their environment and are more likely to survive and reproduce is called... |
| Variation | Any difference between individuals of the same species is a... |
| Half Life | The time it takes for half of the atoms in a sample to decay is its.. |
| Scientific Theory | A well tested concept that explains a wide range of observations is a... |
| Punctuated Equilibrium | The theory that species evolve quickly during short bursts of time is... |
| Fossil Record | Documentations of the millions of fossils scientists have collected over the time is called the... |
| Radioactive Elements | Unstable elements that decay or break down into different elements are... |
| Homologous Structure | Similar structures that are related species have inherited from common ancestors are called... |
| Mold | A hollow space left where the fossil has decayed or dissolved is called... |
| Relative Dating | A process comparing the age of two fossils by their placement in the layers of sedimentary rock layers is... |
| Evolution | Gradual changes in a species over time is called... |
| Petrified Fossils | Fossils that are buried in sediments and actualy changed to rock are... |
| Adaptation | A trait that helps an organism survive and reproduce is an... |
| Gradualism | The theory that evolution occurs slowly but steadily is... |
| Branching Tree | A diagram that shows how scientists think different groups of organisms are related is a... |
| Radioactive Dating | A process that tests the radioactive materials within a fossil to tell its actual age is called... |
| Fossils | Perserved remains of an organism that lived in the past are... |
| Extinctism | When no member of the species is still alive it is called... |
| Cast | A copy of the shape of the organism made is called... |
| Competition | This is a factor in Natural Selection as organisms attempt to survive using the same limited resources |
| Homologous Structure | Evidence that related species have a common ancestor because of the way their bodies are anatomicall constructed in similar ways. (dolphin flipper, bird wing, dog leg) |
| Overproduction of Offspring | This factor in Natural Selection happens when there are more offspring that can possibly survive on the given resources |
| Species | A group of organisms that can mate together and produce offspring. |
Created by:
22emorrisroe
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