⟩ Contrast the process that forms igneous rocks with the process that form metamorphic rocks.
Igneous rocks form in quite a different way to metamorphic rocks.
Igneous rocks form due to heat and volcanic activity specifically they form when molten rock cools and becomes solid.
However, metamorphic rocks are existing rocks - perhaps igneous ones - that have been changed by great pressure and often-great heat into metamorphic rocks.