3. A geology student describes a rock sample she is studying in class. The rock
sample is igneous rock, but the student wonders if the material that it formed
from was part of a sedimentary rock formation millions of years ago. Could this
be correct? Could the material for igneous rock come from sedimentary rock?
a Yes, if sedimentary rock is exposed to energy from the sun at Earth’s surface
for a long enough time, it can melt into liquid rock and form igneous rock.
b Yes, if sedimentary rock is moved below Earth’s outer layer and exposed to
energy from Earth’s interior, it can melt into liquid rock and form igneous rock.
c No, igneous rock can only form from other igneous rock. Sedimentary rock
cannot change into igneous rock.
d No, igneous rock forms under Earth’s outer layer due to energy from
Earth’s interior, but sedimentary rock only forms at Earth’s surface.