Rock Types, Examples, And Characteristics

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Rock Types, Examples, And Characteristics

The earth is made up of basic elements such as tock, soil and minerals. The rocks found on and in the earth have different properties that help in maintaining the earth as it is. Give it a try and discover new facts about these rocks and their uses. All the best!


Questions and Answers
  • 1. 
    If a rock were formed from molten magma, what type of rock is it?
    • A. 

      Igneous

    • B. 

      Sedimentary

    • C. 

      Metamorphic

  • 2. 
    If an igneous rock's grain size were classified as course, it would likely be:
    • A. 

      Extrusive

    • B. 

      Intrusive

  • 3. 
    Identify the following igneous rock...it has fine grain size and is extrusive.
    • A. 

      Granite

    • B. 

      Obsidian

    • C. 

      Pumice

    • D. 

      Diorite

  • 4. 
    Identify the following igneous rock...it is glassy and is extrusive.
    • A. 

      Granite

    • B. 

      Obsidian

    • C. 

      Pumice

    • D. 

      Diorite

  • 5. 
    Igneous rocks that cool very quickly above the Earth's surface are considered:
    • A. 

      Extrusive

    • B. 

      Intrusive

  • 6. 
    Rocks that form due to the lithification of sediments are considered:
    • A. 

      Igneous

    • B. 

      Sedimentary

    • C. 

      Metamorphic

  • 7. 
    Identify the following rock that is formed when mud compacts at the bottom of a freshwater lake.
    • A. 

      Conglomerate

    • B. 

      Coal

    • C. 

      Limestone

    • D. 

      Shale

  • 8. 
    In what type of environment is a conglomerate rock likely formed?
    • A. 

      Glacial

    • B. 

      River

    • C. 

      Swamp

    • D. 

      Windy

  • 9. 
    Identify the following rock that is formed in sand rich areas.
    • A. 

      Breccia

    • B. 

      Sandstone

    • C. 

      Limestone

    • D. 

      Shale

  • 10. 
    Sedimentary rocks that form due to evaporation of water (such as halite or gypsum) are classified as:
    • A. 

      Chemical

    • B. 

      Clastic

  • 11. 
    Rocks that form due to intense heat and pressure are known as:
    • A. 

      Igneous

    • B. 

      Sedimentary

    • C. 

      Metamorphic

  • 12. 
    Metamorphic rocks that form in areas that undergo regional metamorphism are likely:
    • A. 

      Foliated

    • B. 

      Non-foliated

  • 13. 
    Quartzite is an example of a non-foliated rock.  Is it formed by regional or contact metamorphism?
    • A. 

      Regional

    • B. 

      Contact

  • 14. 
    Identify the following foliated rock.
    • A. 

      Slate

    • B. 

      Gneiss

    • C. 

      Quartzite

    • D. 

      Marble

  • 15. 
    Identify the following non-foliated rock.
    • A. 

      Slate

    • B. 

      Gneiss

    • C. 

      Quartzite

    • D. 

      Marble

  • 16. 
    Identify the following rock that has angular grain shape.
    • A. 

      Conglomerate

    • B. 

      Limestone

    • C. 

      Shale

    • D. 

      Breccia

  • 17. 
    Identify the pictured rock.
    • A. 

      Pumice

    • B. 

      Conglomerate

    • C. 

      Quartzite

    • D. 

      Limestone

  • 18. 
    In what type of environment would the following rock likely have formed?
    • A. 

      Swamp

    • B. 

      Marine/ocean

    • C. 

      River

    • D. 

      Glacial

  • 19. 
    What type of metamorphism did this rock likely experience?
    • A. 

      Foliated

    • B. 

      Non-foliated

    • C. 

      Contact

    • D. 

      Regional

  • 20. 
    How fast did the crystals cool when this igneous rock formed?
    • A. 

      Slow

    • B. 

      Fast