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SCI 6th BF C2. 1-4
Science 6th Book F Chapter 2 Sections 1-4
Term | Definition |
---|---|
rock | a naturally occurring solid mixture of one or more minerals or organic matter |
rock cycle | the geological processes by which a rock forms, changes types, is destroyed and forms again |
erosion | the process by which wind, water, ice or gravity transports soil and sediment from one location to another |
deposition | the process in which material is laid down (think deposit) |
composition | chemical make-up of the rock; describes the minerals or materials in the rock |
texture | the quality of the rock based on the sizes, shapes or position of the rock's grains |
stratification | the process in which sedimentary rocks are arranged in layers |
strata | layers of rock |
igneous rock | hot magma (liquid rock) cools and becomes solid over time |
sedimentary rock | sediment or rock/mineral fragments that are compressed or bound together in many layers over time |
metamorphic rock | a rock's texture, structure or composition has been changed by intense pressure, heat or both. |
Moh's Hardness Scale | The scale used to measure the hardness (it ability to be scratched) of a rock |
hardness | the measure the rock's resistance to scratching |
luster | the way the rock reflects light |
cleavage | the breakage of a mineral/rock on a flat plane |
streak | the color of the powdery residue left behind after you drag the mineral/rock across a hard plate |
fracture | uneven breakage of a mineral/rock |
crystal form | how a mineral/rock grows |