Choose answer in the box below.

_____1. Formation of intrusive igneous rock.
_____2. Eruption of internally derived magma to form surface deposits.
_____3. This is produced by the decay of radioactive elements or radioactivity, the energy released when the unstable atoms decay.
_____4. These occur when warmer parts of a fluid rise, while cooler parts sink.
_____5. This is heat transfer by direct contact of particles of matter.
_____6. This is formed when the rocks crystalized from lava at the earth's surface where they cool quickly to form small crystal or amorphous glass.
_____7. A type of extrusive igneous rock with a family of fine-grained, extrusive igneous rocks that are usually light to dark gray in color.
_____8. A type of intrusive igneous rock with coarse-grained, dark-colored, ultramafic igneous rocks.​