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Correct Answer: Option A — Quartzite. Quartzite is correct because it is a hard metamorphic rock. Quartzite is also associated with formed from sandstone rich in quartz. A further identifying fact is that Quartzite is very resistant to weathering. Another useful fact is that Quartzite is associated with used as construction aggregate and decorative stone. Why the other options are incorrect: Option B — Granite: It is an intrusive igneous rock and is associated with formed by slow cooling of magma below the surface; those are the identifying facts of Granite. Option C — Basalt: It is an extrusive igneous rock and is associated with formed by rapid cooling of lava at the surface; those are the identifying facts of Basalt. Option D — Pumice: It is a vesicular volcanic rock and is associated with formed when gas-rich lava cools rapidly; those are the identifying facts of Pumice. Exam Takeaway: Link Quartzite with “a hard metamorphic rock” and “formed from sandstone rich in quartz” for quick revision.
