Structures of the Universe: Star Systems Quiz
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Questions and Answers

Which characteristics can be used to differentiate star systems? (Select three options)

  • The age of the stars in the system (correct)
  • The way stars are organized in the system (correct)
  • The number of stars in the system (correct)
  • The color of the stars

    • A/An ______ star system is made of two stars.

    binary

    A/An ______ star system is made of no more than a few thousand stars.

    open cluster

    A/An ______ star system is made of more than a million stars.

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

    Which type of star system is pictured?

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

    Based on the information provided, which title would be most appropriate?

    <p>New Planet Discovered in Binary Star System</p> Signup and view all the answers

    Which characteristic is used to classify galaxies?

    <p>the shape of the galaxy</p> Signup and view all the answers

    How are NGC 1427A and U different?

    <p>NGC 1427A is irregular while U is a spiral galaxy.</p> Signup and view all the answers

    What type of galaxy is shown in the image?

    <p>barred spiral galaxy</p> Signup and view all the answers

    Which type of galaxy is shown in the image?

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

    What phrase best defines a galaxy?

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

    Which phenomenon describes the dimmer star passing in front of the brighter star?

    <p>eclipsing binary</p> Signup and view all the answers

    Which phrases accurately describe an elliptical galaxy? (Check all that apply)

    <p>Has almost no gas or dust between stars</p> Signup and view all the answers

    What type of galaxy is shown in the image?

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

    What best describes the second type of spiral galaxy?

    <p>has a bar through the middle from which arms extend</p> Signup and view all the answers

    Which type of star cluster is shown in the image?

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

    Which sentences describe star clusters? (Check all that apply)

    <p>Stars form from the same nebula.</p> Signup and view all the answers

    Which statements accurately describe binary star systems? (Check all that apply)

    <p>Often have one star that is brighter than the other</p> Signup and view all the answers

    What are the main types of star clusters? (Check all that apply)

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

    Which type of star system has the most stars?

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

    Which phrases accurately describe a light-year? (Check all that apply)

    <p>9.46 trillion kilometers (5.88 trillion miles)</p> Signup and view all the answers

    Which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center?

    <p>normal spiral</p> Signup and view all the answers

    What type of star cluster is shown in the image?

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

    Which words identify types of galaxies? (Check all that apply)

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

    Which term defines a star system with two stars?

    <p>binary star system</p> Signup and view all the answers

    Which are types of star systems? (Check all that apply)

    <p>Open clusters</p> Signup and view all the answers

    Which quantity does a light-year measure?

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

    What is the Milky Way?

    <p>a spiral galaxy in which Earth is located</p> Signup and view all the answers

    Which phrases describe an irregular galaxy? (Check all that apply)

    <p>Is smaller than other types of galaxies</p> Signup and view all the answers

    Which characteristics describe a spiral galaxy? (Check all that apply)

    <p>Contains a lot of gas and dust</p> Signup and view all the answers

    Which feature is used to classify galaxies?

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

    Which type of star cluster forms from tightly packed groups of older stars?

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

    Which type of star cluster is loose and disorganized?

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

    What phrase best defines a star system?

    <p>group of two or more stars</p> Signup and view all the answers

    Study Notes

    Star Systems

    • Characteristics for differentiating star systems include the number of stars, their ages, and their organization.
    • A binary star system consists of two stars.
    • Open clusters contain a few hundred to a few thousand stars, while globular clusters have more than a million stars.
    • Eclipsing binaries occur when a dim star passes in front of a brighter star.
    • Binary star systems may exhibit wobbling due to gravitational interactions and often involve one brighter star.

    Star Clusters

    • Star clusters are groups of stars that form from the same nebula and are located at similar distances from Earth.
    • Main types of star clusters are globular and open. Globular clusters feature tightly packed older stars, while open clusters are more loose and disorganized.

    Galaxies

    • Galaxies are vast collections of stars, gas, and dust held together by gravity.
    • Common classifications of galaxies include elliptical, spiral, and irregular.
    • Characteristics of spiral galaxies include a pinwheel shape, plentiful gas and dust, and active star formation within their arms.
    • Elliptical galaxies lack new star formation and have little gas or dust between stars.
    • Irregular galaxies contain many young stars and are smaller than other galaxy types.

    Types of Spiral Galaxies

    • Two types of spiral galaxies: normal spiral galaxies and barred spiral galaxies, the latter having a bar structure through the center.

    Milky Way

    • The Milky Way is a spiral galaxy that is home to Earth.

    Light-Year

    • A light-year measures distance, specifically how far light travels in a year, equivalent to approximately 9.46 trillion kilometers (5.88 trillion miles).

    Characteristics of Specific Galaxies

    • Irregular galaxies are marked by abundant young stars, gas, and dust.
    • Barred spiral galaxies have arms extending from a central bar, distinguishing them from regular spiral galaxies.

    Classification Criteria

    • Galaxies can be classified based on their shapes: elliptical, spiral, and irregular.
    • Light-years are a crucial unit for measuring cosmic distances.

    Active Star Formation

    • Sites of active star formation predominantly occur in the arms of spiral galaxies.

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    Description

    Test your knowledge of star systems and their distinguishing characteristics with this quiz. Explore the differences between various star systems, their organization, and composition. Learn about the basic principles that define these celestial structures.

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