| A | B |
|---|
| texture | the look and feel of a rock's surface |
| grain | particles of other minerals or rocks |
| igneous rock | forms from the cooling of molten rock-either magma below the surface or lava at the surface |
| sedimentary rock | forms when particles of other rocks or the remains of plants and animals are pressed and cemented together |
| metamorphic rock | formed when an existing rock is changed by heat, pressure, or chemical reactions |
| sediment | small, solid pieces of material that come from rocks or other living things |
| erosion | occurs when running water or wind loosen and carry away the fragments of rock |
| deposition | the process by which sediment settles out of the water or wind carrying it |
| compaction | the process that presses sediment together |
| cementation | the process in which dissolved minerals crystallize and glue particles of sediment together |
| clastic rock | a sedimentary rock that forms when rock fragments are squeezed together |
| organic rock | forms where the remains of plants and animals are deposited in thick layers |
| chemical rock | forms when minerals that are dissolved in a solution crystallize |
| rock cycle | a series of processes on the surface and inside Earth that slowly change rocks from one kind to another |
