| A | B |
|---|
| organic rock | forms from remains of living things |
| calcite, coal, chalk | types of organic rocks |
| how organic rock is formed | pressed and cemented together |
| chalk | made from dead animals and plants |
| chemical rock | forms from chemicals dissolved in water |
| salt and gypsum | types of chemical rock |
| sandstone | made of sand-sized grains that are mostly quartz |
| shale, sandstone, conglomerate | types of clastic rocks |
| conglomerate | formed from rounded pebbles |
| clastic rock | most common type of sedimentary rock |
| sediment | solid particles that can include sand, soil, pebbles and the remains of dead animals |
| how sedimentary rocks form | layers of sediment gather and are pressed toghether |
| lake or oceans | where sedimentary rocks are most commonly formed |
