| A | B |
|---|
| texture | The look and feel of a rock's surface determined by the size, shape and pattern of a rock's grains. |
| grain | A particle of mineral or other rock that gives a rock its texture. |
| 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 heat, pressure, or chemical reactions. |
| sedimentary rock | A type of rock that forms when particles fromother rocks or the remains of lants and animals are pressed and cemented together. |
| 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 rock texture in which large crystals are scattered on a background of much smaller crystals. |
| sediment | Small, solid particles of materials from rocks or organisms which are moved by water or wind, resulting in erosion adn depostion. |
| compaction | The process by which sediment are pressed together under their own weight. |
