The molten rock expelled by a volcano is called ____. |
batholith |
The molten rock below the Earth's surface is called ____. |
element |
Minerals are identified by their hardness and ____ (powder color). |
glass |
Volcanic ____ is the product of rapidly cooling lava. |
hardness |
Quartzite is a rock, whereas quartz (silicon dioxide) is a ____. |
lava |
Mount Rushmore is a granite ____ formation in South Dakota. |
magma |
Carbon, copper, silver, and sulfur are single ____ minerals. |
mineral |
The Mohs scale is used to measure the ____ of a mineral. |
streak |