jill has found evidence that suggests that individual volcanoes produce igneous rocks with a certain chemical signature. she predicts that scientists could use an igneous rock's chemical signature to determine where the rock came from. what type of investigation should jill perform to test her prediction?
a.
model the formation of an igneous rock
b.
observe and describe a volcanic eruption
c.
collect and test rock specimens
d.
perform a controlled experiment on a volcano