| A | B |
|---|
| mineral | naturally ocurring, inorganic solid that has a crystal structure and a definite chemical composition |
| inorganic | not formed from living things or the remains of living things |
| streak | the color of a mineral's powder |
| luster | the way of a mineral reflects light from its surface |
| cleavage | a mineral's ability to split easily along flat surfaces |
| fracture | the way a mineral looks when it breaks apart in an irregular way |
| grains | the particles of minerals or other rocks that give a rock its texture |
| texture | the look and feel of a rock's surface |
| igneous rock | a type of rock that forms from the cooling of molten rock at or below the surface |
| sedimentary rock | type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together |
| metamorphic rock | type of rock that forms from an existing rock that is a changed by heat, pressure, or chemical reactions |
| extrusive rock | igneous rock that forms from lava on Earth's surface |
| intrusive rock | igneous rock that forms when magma hardens beneath Earth's surface |
| sediment | small, solid pieces of material that come from rocks or organisms |
| compaction | the process by which sediments are pressed together under their own weight |
| cementation | process by which dissolved minerals crystallize and glue particles of sediment together into one mass |
| foliated | describes metamorphic rocks that have grains arranged in parallel layers or bands |
| rock cycle | a series of processes on the surface and inside Earth that slowly changes rocks from one kind to another |
