Here are the matched items:
- used for building - granite
- covers ocean floor - basalt
- extrusive igneous rock - formed on the surface
- intrusive igneous rock - formed below the surface
- slow cooling - large crystals
- fast cooling - small crystals
So, the matches are as follows:
- 1 with granite
- 2 with basalt
- 3 with formed on the surface
- 4 with formed below the surface
- 5 with large crystals
- 6 with small crystals