| Volcanic ____ is the product of rapidly cooling lava. |
cleavage |
| The molten rock below the Earth's surface is called ____. |
element |
| Minerals of sedimentary rocks came from the ____ of other rocks. |
erosion |
| The molten rock expelled by a volcano is called ____. |
glass |
| Carbon, copper, silver, and sulfur are single ____ minerals. |
lava |
| The ____ of a mineral can be dull, glassy, or brilliant. |
luster |
| Quartzite is a rock, whereas quartz (silicon dioxide) is a ____. |
magma |
| The tendency of a mineral to split along a flat surface is ____. |
mineral |
