Which Rocks term is correctly associated with formation process: “formed mainly from shale under pressure and heat”, and also with “splits into smooth thin sheets”?

Correct Answer: Option B — Slate. Slate is correct because it is formed mainly from shale under pressure and heat. Slate is also associated with splits into smooth thin sheets. 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 formed from sandstone rich in quartz and is associated with very resistant to weathering; those are the identifying facts of Quartzite. Option C — Granite: It is formed by slow cooling of magma below the surface and is associated with coarse-grained with visible crystals; those are the identifying facts of Granite. Option D — Basalt: It is formed by rapid cooling of lava at the surface and is associated with dark-coloured and fine-grained; those are the identifying facts of Basalt. Exam Takeaway: Link Slate with “formed mainly from shale under pressure and heat” and “splits into smooth thin sheets” for quick revision.