Unit 6 - Geological Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
| Term | Definition |
| Amber | fossilized tree resin |
| Fossil | the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock. |
| Cast | an object made by shaping molten metal or similar material in a mold |
| Index Fossil | a fossil that is useful for dating and correlating the strata in which it is found. |
| Mold | a distinctive and typical style, form, or character. |
| Permineralization | process of fossilization in which mineral deposits form internal casts of organisms |
| Trace fossil | a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself. |
| Cross-cutting relationships | states that an igneous intrusion is always younger than the rock it cuts across |
| Geologic time | a system of chronological measurement that relates stratigraphy to time |
| Lateral Continuity | states that layers of sediment initially extend laterally in all directions; in other words, they are laterally continuous |
| Original horizontality | states that layers of sediment are originally deposited horizontally under the action of gravity |
| Relative age | common practice for dating rocks, science of determining the relative order of past events |
| Superposition | principle of quantum theory that describes a challenging concept about the nature and behavior of matter and forces at the sub-atomic level. |
| Unconformity | a surface of contact between two groups of unconformable strata. |
| Uniformitarianism | the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes. |
| Absolute Age | the true age of a rock or fossil |
| Half-life | he time taken for the radioactivity of a specified isotope to fall to half its original value. |
| Ice core | a core sample that is typically removed from an ice sheet |
| Isotope | help determine the chemical composition and age of minerals and other geologic objects. |
| Radiometric dating | any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product. |
| Differentiation | The geological process by which the Earth came to have its present interior structure |
| Outgassing | To remove embedded gas from (a solid), as by heating or reducing the pressure |
| Supercontinent | each of several large landmasses (notably Pangaea, Gondwana, and Laurasia) thought to have divided to form the present continents in the geological past. |
| Pangaea | hypothetical supercontinent that included all current land masses, believed to have been in existence before the continents broke apart during the Triassic and Jurassic Periods. |
| Orogeny | a process in which a section of the earth's crust is folded and deformed by lateral compression to form a mountain range. |
| Evoluation | the gradual development of something, especially from a simple to a more complex form. |
| Natural selection | the process by which plants and animals that can adapt to changes in their environment are able to survive and reproduce while those that cannot adapt do not survive |
Created by:
3082697
Popular Earth Science sets