Fossils 4-1 "G"
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11 terms
Terms | Definitions |
|---|---|
 fossil | The preserved remains or traces of living things. |
| paleontologist | A scientist who studies fossils to learn about organisms that lived long ago. |
| sedimentary rock | The type of rock that is made of hardened sediment. |
| petrified fossil | A fossil in which minerals replace all or part of an organism. |
| mold | A fossil formed when an organism buried in sediment dissolves, leaving a hollow area. |
| cast | A fossil that is a copy of an organism's shape, formed when minerals seep into a mold. |
| carbon film | A type of fossil consisting of an extremely thin coating of carbon on rock. |
| trace fossils | A type of fossil that provides evidence of the activities of ancient organisms. |
| scientific theory | A well-tested concept that explains a wide range of observations. |
| evolution | The process by which all the different kinds of living things have changed over time. |
| extinct | Describes a type of organism that no longer exists anywhere on Earth. |
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