Gr 8 Natural Sciences Ch 4.2: What is beyond the Milky Way Galaxy?
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Questions and Answers

What is the typical structure of the Universe on the largest scales?

  • A uniform distribution of galaxies throughout the Universe
  • A sponge-like structure with galaxy clusters forming thin walls (correct)
  • A hierarchical structure with galaxies at the center
  • A spiral structure with galaxy clusters at the outer edges

    • What is the approximate age of the Universe in billions of years?

  • 15.1
  • 10.2
  • 13.7 (correct)
  • 17.5

    • What is the term for the vast empty regions between galaxy clusters?

  • Galaxy voids
  • Voids (correct)
  • Cosmic caverns
  • Dark matter regions

    • What is the approximate diameter of the observable Universe in billions of light years?

    <p>93</p> Signup and view all the answers

    What is the term for a larger collection of galaxies that can span tens of millions of light years?

    <p>Galaxy cluster</p> Signup and view all the answers

    What is a galaxy?

    <p>A massive collection of stars, gas, and dust held together by gravity</p> Signup and view all the answers

    What is the estimated number of galaxies in the Universe?

    <p>Around 100 to 200 billion</p> Signup and view all the answers

    What is the approximate distance to the Andromeda Galaxy from the Milky Way?

    <p>2.5 million light years</p> Signup and view all the answers

    What type of galaxy is the Milky Way?

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

    What is the purpose of galactic filaments?

    <p>To connect galaxy clusters in a thread-like formation</p> Signup and view all the answers

    What is a characteristic of elliptical galaxies?

    <p>They contain older stars and less gas and dust</p> Signup and view all the answers

    What is the Local Group?

    <p>A small collection of galaxies</p> Signup and view all the answers

    What is a characteristic of irregular galaxies?

    <p>They do not fit into the other categories and have an irregular shape</p> Signup and view all the answers

    What is the main difference between a galaxy cluster and a supercluster?

    <p>The way they are formed</p> Signup and view all the answers

    What is the function of filaments in the structure of the Universe?

    <p>To form walls that contain voids</p> Signup and view all the answers

    Why is the observable Universe much larger than 13.7 billion light years in diameter?

    <p>Because of the expansion of the Universe</p> Signup and view all the answers

    What is the name of the supercluster that the Local Group is part of?

    <p>Virgo Supercluster</p> Signup and view all the answers

    What is the characteristic shape of the Universe on the largest scales?

    <p>Sponge-like</p> Signup and view all the answers

    What is the primary difference between a galaxy group and a galaxy cluster?

    <p>The number of galaxies they contain</p> Signup and view all the answers

    Which type of galaxy is characterized by a central bulge and disk-like structure but lacks spiral arms?

    <p>Lenticular galaxy</p> Signup and view all the answers

    What is the term for the thread-like structure composed of galaxy clusters?

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

    What is the approximate size of the Milky Way galaxy?

    <p>100,000 light years across</p> Signup and view all the answers

    What is the characteristic of small galaxies?

    <p>They contain a few million stars</p> Signup and view all the answers

    How long would it take to travel to the Andromeda galaxy at the speed of light?

    <p>2.5 million years</p> Signup and view all the answers

    What is the characteristic of barred spiral galaxies?

    <p>They have a bar-shaped structure of stars extending from the central bulge</p> Signup and view all the answers

    What is the term for the totality of all space, time, matter, and energy?

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

    What is the primary purpose of galaxy filaments in the structure of the universe?

    <p>To connect galaxy clusters and create a network of galaxies</p> Signup and view all the answers

    What is the characteristic shape of a lenticular galaxy?

    <p>Disk-like with a central bulge but no spiral arms</p> Signup and view all the answers

    What is the estimated number of stars in a large galaxy?

    <p>Several trillion</p> Signup and view all the answers

    What is the term for a collection of galaxies that includes the Milky Way and the Andromeda Galaxy?

    <p>Galaxy group</p> Signup and view all the answers

    What is the approximate size of the Milky Way galaxy in light years?

    <p>100,000</p> Signup and view all the answers

    What is the term for the empty regions of space between galaxy clusters?

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

    What is the characteristic of barred spiral galaxies?

    <p>Presence of a bar-shaped structure</p> Signup and view all the answers

    What is the estimated number of galaxies in the observable universe?

    <p>100 billion</p> Signup and view all the answers

    What is the main reason for the observable Universe being much larger than 13.7 billion light years in diameter?

    <p>Galaxies that emitted light long ago are now much farther away due to the expansion of the Universe</p> Signup and view all the answers

    What is the characteristic shape of galaxy clusters on large scales?

    <p>Thin walls called filaments</p> Signup and view all the answers

    What is the primary difference between a galaxy cluster and a supercluster?

    <p>Structure, with superclusters being formed by many galaxy clusters coming together</p> Signup and view all the answers

    What is the purpose of the vast empty regions between galaxy clusters?

    <p>There is no purpose, they are simply a natural occurrence</p> Signup and view all the answers

    What is the correct sequence of galaxy groupings from smallest to largest?

    <p>Galaxy, galaxy group, galaxy cluster, supercluster</p> Signup and view all the answers

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