Chapter 1 - Key Terms, Part 1 of 4

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This exercise asks you to match the key term in the left-hand column with its correct definition in the right-hand column. Do this by typing the number of the key term in the box beside its correct definition.

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1. Actualism   A surface along which rocks have broken and moved.
2. Angular unconformity   Sedimentary deposits consisting of salts that accumulate in layers.
3. Asthenosphere   The belief that floods caused by supernatural forces formed most of the rocks visible at Earth's surface.
4. Catastrophism   An environment and the group of organisms that live within it.
5. Core   An unconformity above rocks that underwent erosion before the beds above the unconformity were deposited.
6. Crust   The process by which particular forms of life give rise to other forms of life by way of genetic changes.
7. Crystalline rocks   The weak, partially molten region of the mantle.
8. Disconformity   The disappearance of a species from Earth.
9. Ecosystem   Less dense, light-colored, iron-rich rocks of the continental crust.
10. Evaporites   The application of geologic processes discovered and analyzed today, in accordance with the principle of uniformitarianism, to ancient rocks. "The present is the key to the past."
11. Evolution   The eroded surface that results when a group of rocks has been tilted and eroded and younger rocks have been deposited on top of them.
12. Extinction   A place within the Earth where rocks move against other rocks along a fault and produce seismic waves.
13. Fault   The dense central part of the Earth, made up of a solid inner portion and a liquid outer portion.
14. Felsic rocks   Igneous and metamorphic rocks.
15. Focus   The outermost layer of the lithosphere, made up of relatively light material.

   

[CH 1 OSG]