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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. It does not scratch glass. Based on this information, its Mohs hardness is most likely:

  • A.A) Between 1 and 2
  • B.B) Between 2.5 and 3
  • C.C) Between 3.5 and 5
  • D.D) Between 5.5 and 6.5

2. A mineral breaks into thin, flexible sheets along one set of parallel planes. Which property and example best match this description?

  • A.A) Cleavage; mica
  • B.B) Cleavage; quartz
  • C.C) Fracture; halite
  • D.D) Fracture; calcite

3. A geologist observes an igneous rock with large, easily visible crystals of feldspar and quartz. Which interpretation is most accurate?

  • A.A) It is intrusive and cooled slowly beneath Earth’s surface
  • B.B) It is intrusive and cooled rapidly at Earth’s surface
  • C.C) It is extrusive and cooled slowly beneath Earth’s surface
  • D.D) It is extrusive and cooled very rapidly, forming glassy texture

4. Which pair correctly matches the rock with its primary rock type and formation process?

  • A.A) Sandstone – igneous; crystallization from magma
  • B.B) Coal – organic sedimentary; accumulation of plant remains
  • C.C) Basalt – metamorphic; regional metamorphism of shale
  • D.D) Marble – clastic sedimentary; cemented carbonate grains

5. Which statement best distinguishes cleavage from fracture in minerals?

  • A.A) Cleavage is how a mineral resists scratching; fracture is how it breaks
  • B.B) Cleavage is breaking along flat planes; fracture is irregular or curved breaking surfaces
  • C.C) Cleavage is related to color; fracture is related to luster
  • D.D) Cleavage only occurs in metallic minerals; fracture only in non-metallic minerals

6. Quartz and calcite can appear similar in hand sample. Which property most reliably distinguishes quartz from calcite in the lab?

  • A.A) Both have identical hardness, so they cannot be distinguished by hardness
  • B.B) Quartz reacts strongly with dilute acid; calcite does not react
  • C.C) Quartz has conchoidal fracture and hardness 7; calcite has perfect rhombohedral cleavage and hardness 3
  • D.D) Quartz is much harder and does not effervesce in dilute acid; calcite is softer and effervesces in dilute acid

7. Which sequence correctly represents a possible path in the rock cycle?

  • A.A) Sediment → compaction and cementation → sedimentary rock → heat and pressure → metamorphic rock
  • B.B) Sediment → melting → metamorphic rock → cooling → igneous rock
  • C.C) Magma → weathering and erosion → sediment → deposition → igneous rock
  • D.D) Metamorphic rock → cooling and crystallization → magma → uplift → sedimentary rock

8. A metamorphic rock shows distinct bands of light and dark minerals arranged in layers. Which term and example best fit this description?

  • A.A) Foliated; gneiss
  • B.B) Foliated; marble
  • C.C) Non-foliated; slate
  • D.D) Non-foliated; schist

9. A student describes a mineral as having a vitreous luster, white streak, hardness of 7, and conchoidal fracture. Based on these properties, the mineral is most likely:

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

10. Which sedimentary rock is correctly paired with its sediment type and classification?

  • A.A) Sandstone – sand-sized clasts; clastic sedimentary
  • B.B) Limestone from shell fragments – sand-sized clasts; clastic sedimentary only
  • C.C) Rock salt – plant remains; organic sedimentary
  • D.D) Conglomerate – microscopic crystals; chemical sedimentary

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.