| A | B |
|---|
| texture | the look and feel of a rock's surface |
| grain | A particle opf mineral or other rock that gives a rock its texture |
| sedimentary rock | A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together |
| igneous | A type of rock that forms from the cooling of molten rock at or below the surface |
| metamorphic rock | A type of rock that forms from an existing rock that is changed by neat, 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 |
| Porphyritic texture | An igneous texture in which larger crystals are scattered on a background of much smaller crystals |
| sediment | Small, solid pieces of material that comes from rocks or organisms |
| erosion | The destructive process in which water or wind losen and carry away fragments or rock |
| deposition | The process by which sediment settles out of water or wind that is carrying it |
| compaction | The process by which sediments are pressed together under their own weight |
| cementation | the process by which dissolved minerals crystallize and glue particles of sediment together into one mass |
| clastic rock | Sedimentary rock that forms when rock fragments are squeezed together under high pressure |
| organic rock | Sedimentary rock that forms where remains of organisms are deposited in thick layers |
| chemical rock | Sedimentary rock that forms when minerals crystallize from a solution |
| foliated | Term used to describe metamorphic rocks whose grains are arranged in parallel layers or bands |
| rock cycle | A series of processes on the surface and inside Earth that slowly change rocks from one kind to another |
