| A | B |
|---|
| rocks | building blocks of the Earth |
| igneous rocks | rocks that were originally hot, fluid magma, and get their mane from the latin word ignis |
| sedimentary rocks | rocks formed from particals that have been carried along and deposited by wind and water |
| metamorphic rocks | rocks that are formed when chemical reactions, tremendous heat, and/or great pressure change existing rocks into new kinds of rocks |
| sedments | the particals in a sedimentary rock |
| rock cycle | the continous changing of rocks from one kind to another over long periods of time |
| extrusive rocks | rocks formed from lava |
| intrusive | igneous rocks formed deep within the Earth |
| gemstones | hard, beautiful, and durable substances that can be cut and polished for jewerly and decoration |
| metals | elements that have shiny surfaces and are able to conduct electricity and heat |
| nonmetals | elements that have dull surfaces and are poor cunductors of electriciy and heat |
| ores | used to describe minerals or combonations of minerals from which metals and nonmetals can be removed id usable amounts |
| density | the amount of matter in a given space |
| cleavage and fracture | used to describe the way a mineral breaks |
| luster | describes the way a mineral reflects light from it's surface |
| hardness | the ability of a mineral to resist being scratched |
