Types of Rocks: Igneous, Sedimentary, Metamorphic
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Questions and Answers

What type of rock is formed when melted rock from inside the Earth cools and hardens?

  • Volcanic rock
  • Metamorphic rock
  • Sedimentary rock
  • Igneous rock (correct)
  • Which mineral is described as the 'softest mineral' and used to make talcum powder?

  • Quartz
  • Talc (correct)
  • Feldspar
  • Zincite
  • Which of the following is NOT a common mineral found in the Earth's crust?

  • Titanium (correct)
  • Pyroxenes
  • Feldspars
  • Olivine
  • What is the main component used to make aluminum?

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

    Which type of rock is formed when other rocks are changed by heat and pressure?

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

    What determines whether a rock is classified as igneous, sedimentary, or metamorphic?

    <p>All of the above factors contribute to rock classification</p> Signup and view all the answers

    Which type of rock is formed from layers of sediment deposited and hardened over time?

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

    What causes existing rocks to transform into metamorphic rocks?

    <p>Being heated and squeezed under intense pressure</p> Signup and view all the answers

    Which best describes the texture of an igneous rock that cooled rapidly?

    <p>Glassy and smooth with no visible grains</p> Signup and view all the answers

    What gradual processes can break down and erode rocks over time?

    <p>Both wind and water erosion</p> Signup and view all the answers

    How do scientists use fossils to understand the past environment?

    <p>By studying the age of rock layers surrounding the fossil</p> Signup and view all the answers

    Which type of rock is formed by the cooling and solidification of magma or lava?

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

    Why are most fossils formed from living things that had hard parts such as bones, shells, and wood?

    <p>Because soft tissues decay rapidly and do not leave a trace</p> Signup and view all the answers

    What type of rocks can be classified according to their color, hardness, and texture?

    <p>All types of rocks</p> Signup and view all the answers

    Why do scientists study fossils found near the South Pole?

    <p>To understand the climate history of the region</p> Signup and view all the answers

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