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Rocks and Minerals Practice Test — Medium Level

A free 10-question Rocks and Minerals practice test for Science Olympiad, written at regional and state level. Every question and answer choice is listed below — correct answers and scoring are revealed when you take the timed test.

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1. A mineral sample can be scratched by a copper penny but not by a fingernail. Based on the given Mohs scale information, which range best estimates this mineral’s hardness?

  • A.A) Less than 2.5
  • B.B) Between 2.5 and 3.5
  • C.C) Between 3.5 and 5.5
  • D.D) Greater than 6.5

2. A mineral breaks into thin, flexible sheets along one set of parallel planes. This behavior is best described as:

  • A.A) One-directional cleavage
  • B.B) Conchoidal fracture
  • C.C) Three-directional cleavage at 90°
  • D.D) Earthy fracture

3. Which property would be most useful to distinguish quartz from calcite in hand sample?

  • A.A) Color of the specimen
  • B.B) Hardness relative to glass
  • C.C) Presence of metallic luster
  • D.D) Specific gravity compared to water

4. A rock composed mainly of visible interlocking crystals of feldspar and quartz, formed from slowly cooled magma deep underground, is best classified as:

  • A.A) Extrusive igneous rock
  • B.B) Intrusive igneous rock
  • C.C) Clastic sedimentary rock
  • D.D) Foliated metamorphic rock

5. Which rock type most commonly forms from the compaction and cementation of sand-sized particles?

  • A.A) Conglomerate
  • B.B) Sandstone
  • C.C) Shale
  • D.D) Limestone

6. A non-foliated metamorphic rock formed from the recrystallization of limestone under heat and pressure is:

  • A.A) Slate
  • B.B) Marble
  • C.C) Gneiss
  • D.D) Quartzite

7. Which process in the rock cycle directly converts an igneous rock at Earth’s surface into a sedimentary rock?

  • A.A) Melting and solidification
  • B.B) Heat and pressure without melting
  • C.C) Weathering, erosion, deposition, and lithification
  • D.D) Rapid cooling of lava at the surface

8. A student observes a dark-colored, fine-grained igneous rock with almost no visible crystals. Which formation environment is most likely?

  • A.A) Slow cooling of magma deep underground
  • B.B) Rapid cooling of lava at or near the surface
  • C.C) Compaction of clay-rich sediments on the seafloor
  • D.D) Metamorphism of quartz sandstone at great depth

9. A mineral has a non-metallic, glassy luster, no visible cleavage, a hardness of 7, and shows conchoidal fracture. It is most likely:

  • A.A) Orthoclase
  • B.B) Calcite
  • C.C) Quartz
  • D.D) Fluorite

10. A foliated metamorphic rock shows distinct bands of light and dark minerals. Which rock is this description most consistent with?

  • A.A) Slate
  • B.B) Schist
  • C.C) Gneiss
  • D.D) Quartzite

Questions are AI-generated for Rocks and Minerals practice and can contain mistakes — check answers against reliable sources. Take the timed version to see correct answers, scoring, and explanations: start the Rocks and Minerals test.