What is a Rock?
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Questions and Answers

What is the characteristic feature of granite?

  • Coarse-grained crystals (correct)
  • Fine-grained crystals
  • Black in colour
  • Glassy appearance

    • What is the common use of polished granite slabs?

  • Production of jewelry
  • Construction of buildings
  • Decoration of buildings (correct)
  • Manufacturing of tools

    • What is the colour of the crystals of feldspar found in granite?

  • Black or silvery white
  • Grey or blue
  • White or pink (correct)
  • Brown or yellow

    • What is the term used to describe minerals that do not affect the classification of granite?

    <p>Accessory minerals</p> Signup and view all the answers

    What is the minimum size of crystals in granite?

    <p>5 mm across</p> Signup and view all the answers

    What type of rocks are used in the sport of curling?

    <p>Granite</p> Signup and view all the answers

    What is the primary mineral found in granite?

    <p>Quartz</p> Signup and view all the answers

    How do granite formations originate?

    <p>Through slow cooling of magma</p> Signup and view all the answers

    What happens to granite over time, especially in humid climates?

    <p>It is easily weathered and decomposes</p> Signup and view all the answers

    What can be found in the region surrounding a granite batholith?

    <p>A variety of minerals, including tin, copper, and zinc</p> Signup and view all the answers

    What process can expose granite at the Earth's surface?

    <p>Weathering and erosion</p> Signup and view all the answers

    What can cause the transformation of earlier-formed rocks into metamorphic rocks?

    <p>Pressure and heat deep underground</p> Signup and view all the answers

    What type of rock can be formed from mud and sand on the beach or in a riverbed?

    <p>Sedimentary rock</p> Signup and view all the answers

    What can sedimentary rocks become through geological processes?

    <p>Both igneous and metamorphic rocks</p> Signup and view all the answers

    What is the process by which magma cools to form crystalline igneous rock?

    <p>Magma cooling</p> Signup and view all the answers

    What is the location of magma?

    <p>Underground</p> Signup and view all the answers

    What do geologists sometimes call igneous rocks?

    <p>Primary rocks</p> Signup and view all the answers

    What is the characteristic of the crystals in igneous rocks?

    <p>They are usually welded together</p> Signup and view all the answers

    Where do intrusive igneous rocks form?

    <p>Underground in large masses</p> Signup and view all the answers

    What do extrusive igneous rocks build?

    <p>Mountains of ash and dust</p> Signup and view all the answers

    What is the texture of igneous rocks?

    <p>Mosaic</p> Signup and view all the answers

    What is a rock composed of?

    <p>A mixture of mineral particles</p> Signup and view all the answers

    How are the ages of rocks determined?

    <p>By studying the fossils they contain or the breakdown of radio-active elements</p> Signup and view all the answers

    What is the first step in the rock cycle?

    <p>The formation of igneous rocks</p> Signup and view all the answers

    What happens to sedimentary rocks if they are buried deep in the Earth's crust?

    <p>They melt and become igneous rocks</p> Signup and view all the answers

    What is the process of extreme heat or pressure that alters rocks?

    <p>Metamorphism</p> Signup and view all the answers

    Approximately how old are the oldest radiometrically dated rocks?

    <p>3900 million years old</p> Signup and view all the answers

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