Which Rocks term is correctly associated with common use or association: “used for roofing and writing boards”, and also with “a low-grade metamorphic rock”?

Correct Answer: Option D — Slate. Slate is correct because it is used for roofing and writing boards. Slate is also associated with a low-grade metamorphic rock. A further identifying fact is that Slate is splits into smooth thin sheets. Another useful fact is that Slate is associated with used for roofing and writing boards. Why the other options are incorrect: Option A — Quartzite: It is used as construction aggregate and decorative stone and is associated with a hard metamorphic rock; those are the identifying facts of Quartzite. Option B — Granite: It is widely used as building and decorative stone and is associated with an intrusive igneous rock; those are the identifying facts of Granite. Option C — Basalt: It is common in oceanic crust and lava plateaus and is associated with an extrusive igneous rock; those are the identifying facts of Basalt. Exam Takeaway: Link Slate with “used for roofing and writing boards” and “a low-grade metamorphic rock” for quick revision.