Answer:
Well this would be science... not physics...
Explanation:
1) both are a product of cooling lava/magma
2) Both stones can be caused during volcanic eruptions or clastic flow
3) Both are igneous in family (duh)
4) Intrusive rocks are formed underground from seeping into crevasses and are slow cooling and extrusive rocks are fast or instant cooling and cool above the surface (if differences are needed)
