Rocks Questions and Answers – Page 3

Correct Answer: Option D — Sandstone. Sandstone is correct because it is commonly used as a building stone. Sandstone is also associated with a clastic sedimentary rock. A further identifying fact is that Sandstone is often shows bedding layers. Another useful fact is that Sandstone is associated with commonly used as a building stone. Why the other options are incorrect: Option A — Limestone: It is a major raw material for cement and is associated with a sedimentary carbonate rock; those are the identifying facts of Limestone. Option B — Shale: It is can metamorphose into slate and is associated with a fine-grained sedimentary rock; those are the identifying facts of Shale. Option C — Marble: It is used in sculpture and architecture and is associated with a metamorphic rock; those are the identifying facts of Marble. Exam Takeaway: Link Sandstone with “commonly used as a building stone” and “a clastic sedimentary rock” for quick revision.

Correct Answer: Option C — Sandstone. Sandstone is correct because it is often shows bedding layers. Sandstone is also associated with commonly used as a building stone. A further identifying fact is that Sandstone is often shows bedding layers. Another useful fact is that Sandstone is associated with commonly used as a building stone. Why the other options are incorrect: Option A — Limestone: It is reacts with dilute acid and is associated with a major raw material for cement; those are the identifying facts of Limestone. Option B — Shale: It is splits into thin layers called fissility and is associated with can metamorphose into slate; those are the identifying facts of Shale. Option D — Marble: It is has interlocking calcite crystals and is associated with used in sculpture and architecture; those are the identifying facts of Marble. Exam Takeaway: Link Sandstone with “often shows bedding layers” and “commonly used as a building stone” for quick revision.

Correct Answer: Option B — Sandstone. Sandstone is correct because it is formed by compaction and cementation of sand grains. Sandstone is also associated with often shows bedding layers. A further identifying fact is that Sandstone is often shows bedding layers. Another useful fact is that Sandstone is associated with commonly used as a building stone. Why the other options are incorrect: Option A — Limestone: It is commonly formed from calcium carbonate remains or precipitation and is associated with reacts with dilute acid; those are the identifying facts of Limestone. Option C — Shale: It is formed from compacted mud and clay and is associated with splits into thin layers called fissility; those are the identifying facts of Shale. Option D — Marble: It is formed mainly by metamorphism of limestone and is associated with has interlocking calcite crystals; those are the identifying facts of Marble. Exam Takeaway: Link Sandstone with “formed by compaction and cementation of sand grains” and “often shows bedding layers” for quick revision.

Correct Answer: Option A — Sandstone. Sandstone is correct because it is a clastic sedimentary rock. Sandstone is also associated with formed by compaction and cementation of sand grains. A further identifying fact is that Sandstone is often shows bedding layers. Another useful fact is that Sandstone is associated with commonly used as a building stone. Why the other options are incorrect: Option B — Limestone: It is a sedimentary carbonate rock and is associated with commonly formed from calcium carbonate remains or precipitation; those are the identifying facts of Limestone. Option C — Shale: It is a fine-grained sedimentary rock and is associated with formed from compacted mud and clay; those are the identifying facts of Shale. Option D — Marble: It is a metamorphic rock and is associated with formed mainly by metamorphism of limestone; those are the identifying facts of Marble. Exam Takeaway: Link Sandstone with “a clastic sedimentary rock” and “formed by compaction and cementation of sand grains” for quick revision.

Correct Answer: Option D — Obsidian. Obsidian is correct because it is historically used for sharp cutting tools. Obsidian is also associated with a volcanic glass. A further identifying fact is that Obsidian is glassy texture with conchoidal fracture. Another useful fact is that Obsidian is associated with historically used for sharp cutting tools. Why the other options are incorrect: Option A — Sandstone: It is commonly used as a building stone and is associated with a clastic sedimentary rock; those are the identifying facts of Sandstone. Option B — Limestone: It is a major raw material for cement and is associated with a sedimentary carbonate rock; those are the identifying facts of Limestone. Option C — Shale: It is can metamorphose into slate and is associated with a fine-grained sedimentary rock; those are the identifying facts of Shale. Exam Takeaway: Link Obsidian with “historically used for sharp cutting tools” and “a volcanic glass” for quick revision.

Correct Answer: Option C — Obsidian. Obsidian is correct because it is glassy texture with conchoidal fracture. Obsidian is also associated with historically used for sharp cutting tools. A further identifying fact is that Obsidian is glassy texture with conchoidal fracture. Another useful fact is that Obsidian is associated with historically used for sharp cutting tools. Why the other options are incorrect: Option A — Sandstone: It is often shows bedding layers and is associated with commonly used as a building stone; those are the identifying facts of Sandstone. Option B — Limestone: It is reacts with dilute acid and is associated with a major raw material for cement; those are the identifying facts of Limestone. Option D — Shale: It is splits into thin layers called fissility and is associated with can metamorphose into slate; those are the identifying facts of Shale. Exam Takeaway: Link Obsidian with “glassy texture with conchoidal fracture” and “historically used for sharp cutting tools” for quick revision.

Correct Answer: Option B — Obsidian. Obsidian is correct because it is formed by extremely rapid cooling of silica-rich lava. Obsidian is also associated with glassy texture with conchoidal fracture. A further identifying fact is that Obsidian is glassy texture with conchoidal fracture. Another useful fact is that Obsidian is associated with historically used for sharp cutting tools. Why the other options are incorrect: Option A — Sandstone: It is formed by compaction and cementation of sand grains and is associated with often shows bedding layers; those are the identifying facts of Sandstone. Option C — Limestone: It is commonly formed from calcium carbonate remains or precipitation and is associated with reacts with dilute acid; those are the identifying facts of Limestone. Option D — Shale: It is formed from compacted mud and clay and is associated with splits into thin layers called fissility; those are the identifying facts of Shale. Exam Takeaway: Link Obsidian with “formed by extremely rapid cooling of silica-rich lava” and “glassy texture with conchoidal fracture” for quick revision.

Correct Answer: Option A — Obsidian. Obsidian is correct because it is a volcanic glass. Obsidian is also associated with formed by extremely rapid cooling of silica-rich lava. A further identifying fact is that Obsidian is glassy texture with conchoidal fracture. Another useful fact is that Obsidian is associated with historically used for sharp cutting tools. Why the other options are incorrect: Option B — Sandstone: It is a clastic sedimentary rock and is associated with formed by compaction and cementation of sand grains; those are the identifying facts of Sandstone. Option C — Limestone: It is a sedimentary carbonate rock and is associated with commonly formed from calcium carbonate remains or precipitation; those are the identifying facts of Limestone. Option D — Shale: It is a fine-grained sedimentary rock and is associated with formed from compacted mud and clay; those are the identifying facts of Shale. Exam Takeaway: Link Obsidian with “a volcanic glass” and “formed by extremely rapid cooling of silica-rich lava” for quick revision.

Correct Answer: Option D — Pumice. Pumice is correct because it is used as an abrasive and lightweight aggregate. Pumice is also associated with a vesicular volcanic rock. A further identifying fact is that Pumice is so porous that some pieces can float on water. Another useful fact is that Pumice is associated with used as an abrasive and lightweight aggregate. Why the other options are incorrect: Option A — Obsidian: It is historically used for sharp cutting tools and is associated with a volcanic glass; those are the identifying facts of Obsidian. Option B — Sandstone: It is commonly used as a building stone and is associated with a clastic sedimentary rock; those are the identifying facts of Sandstone. Option C — Limestone: It is a major raw material for cement and is associated with a sedimentary carbonate rock; those are the identifying facts of Limestone. Exam Takeaway: Link Pumice with “used as an abrasive and lightweight aggregate” and “a vesicular volcanic rock” for quick revision.

Correct Answer: Option C — Pumice. Pumice is correct because it is so porous that some pieces can float on water. Pumice is also associated with used as an abrasive and lightweight aggregate. A further identifying fact is that Pumice is so porous that some pieces can float on water. Another useful fact is that Pumice is associated with used as an abrasive and lightweight aggregate. Why the other options are incorrect: Option A — Obsidian: It is glassy texture with conchoidal fracture and is associated with historically used for sharp cutting tools; those are the identifying facts of Obsidian. Option B — Sandstone: It is often shows bedding layers and is associated with commonly used as a building stone; those are the identifying facts of Sandstone. Option D — Limestone: It is reacts with dilute acid and is associated with a major raw material for cement; those are the identifying facts of Limestone. Exam Takeaway: Link Pumice with “so porous that some pieces can float on water” and “used as an abrasive and lightweight aggregate” for quick revision.