5.9.1 Vocabulary

Lava flowed down the volcano’s side and quickly hardened to form a glassy type of _______________ rock.

Tiny flakes of _______________ fell on the ground as an ancient tool maker worked to create a sharp blade for cutting.

The tiny flakes of rock were washed into a nearby stream, where they joined other sediments created by the _______________ of rock from the nearby mountains.

The sediments formed layers on the stream bed, which _______________ over time as the weight of the layers squeezed out the air and water.

The sediments cemented together and _______________ into rock.

_______________ rock was buried by even more layers of sediments over millions of years.

The heat and pressure from the weight of the overlying rock changed the _______________ of the minerals in the rock.

New _______________ rock formed and lay buried in the earth for millions of years.

Heat from __________________ below the rock melted it, turning it into igneous rock.

As part of its journey through the __________________, this piece of rock might someday be found on a beach in Maine or a mountaintop in Tennessee!