Oia Stars & Galaxies

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  • 1/10 Questions

    The theory that all of the mass in the entire universe was together but then exploded, and has been expanding ever since, is the ___________________________.

    • Big bang theory
    • Copernican model
    • Specialty of Professor Carl Sagan
    • Specialty of Professor Stephen Hawking
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About This Quiz

The 'OIA Stars & Galaxies' quiz explores key astronomical concepts including light-years, radio telescopes, solar phenomena, and the universe's composition. It assesses understanding of cosmology, dark matter, and celestial bodies, enhancing learners' grasp of fundamental and advanced astronomical principles.

Oia Stars & Galaxies - Quiz

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  • 2. 

    The cooler, darker areas of the Sun' s surface are called ___________________.

    • Photospherical

    • Sunspots

    • Dark matter

    • Dark energy

    Correct Answer
    A. Sunspots
    Explanation
    Sunspots are cooler, darker areas on the surface of the Sun. They appear darker because they are relatively cooler compared to the surrounding areas. These regions have intense magnetic activity that inhibits the convective transfer of heat, resulting in lower temperatures. Sunspots are temporary phenomena and can vary in size and shape. They are important for studying solar activity and can have an impact on Earth's climate and communication systems.

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  • 3. 

    Unseen mass that adds to the gravity of a glaxy, but cannot be detected (except for very indirectly), nor seen, is called ___________________.

    • Dark energy

    • Dark matter

    • Solar radiation

    • Massive

    Correct Answer
    A. Dark matter
    Explanation
    Dark matter refers to an unseen mass that contributes to the gravitational pull of a galaxy. It is not directly detectable or visible, hence the term "dark." However, its presence can be inferred through its gravitational effects on visible matter and the way it influences the motion of galaxies and galaxy clusters. Dark matter is considered one of the fundamental components of the universe, accounting for a significant portion of its total mass.

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  • 4. 

    The distance that light travels in one year, about 9.5 trillion kilometers, is called a _______________________.

    • Light-year

    • Light-distance

    • Light-speed

    • Speed of light

    Correct Answer
    A. Light-year
    Explanation
    A light-year is the distance that light travels in one year, which is approximately 9.5 trillion kilometers. It is a unit of measurement used in astronomy to describe vast distances between celestial objects. The term "light-year" emphasizes the relationship between distance and time, indicating the amount of space that light can cover in the span of a year.

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  • 5. 

    Any telescope that collects and amplifies radiowaves coming from objects in space is a ________________________.

    • Refracting telescope

    • Reflecting telescope

    • Radio telescope

    • Hubble Space Telescope

    Correct Answer
    A. Radio telescope
    Explanation
    A radio telescope is a type of telescope that collects and amplifies radiowaves coming from objects in space. Unlike refracting and reflecting telescopes, which use visible light to observe celestial objects, a radio telescope is specifically designed to detect and study radio waves emitted by stars, galaxies, and other astronomical phenomena. The Hubble Space Telescope, on the other hand, is a reflecting telescope that observes in the visible, ultraviolet, and near-infrared regions of the electromagnetic spectrum, but it does not specialize in collecting and amplifying radiowaves.

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  • 6. 

    The study of how the universe began, what it is made of, and how it continues to evolve, is called _____________________.

    • Astrology

    • Planetary geology

    • Astronomy

    • Cosmology

    Correct Answer
    A. Cosmology
    Explanation
    Cosmology is the study of the origin, structure, and evolution of the universe. It focuses on understanding the fundamental questions about the universe, such as how it began, what it is made of, and how it continues to evolve over time. This field of study encompasses various branches of science, including physics and astronomy, and involves the use of observational and theoretical methods to investigate the nature of the universe on a large scale.

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  • 7. 

    The surface layer of the Sun, that gives off light, is the ___________________.

    • Photosphere

    • Sunspot

    • Main sequence

    • Atmosphere

    Correct Answer
    A. Photosphere
    Explanation
    The surface layer of the Sun that gives off light is called the photosphere. This is the layer where most of the visible light that we see from the Sun originates. The photosphere is a relatively thin layer compared to the rest of the Sun's layers, and it has a temperature of around 5,500 degrees Celsius. It is also the layer where sunspots, which are cooler and darker regions, can be observed.

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  • 8. 

    Energy that might be causing accelerated expansion of the universe is called _______________________.

    • Alternative energy

    • Dark energy

    • Dark matter

    • Red giant

    Correct Answer
    A. Dark energy
    Explanation
    Dark energy is the correct answer because it refers to the hypothetical form of energy that is believed to be responsible for the accelerated expansion of the universe. It is called "dark" because it cannot be detected directly and its exact nature is still unknown. Dark energy is thought to make up a significant portion of the total energy content of the universe, but its exact properties and origin remain a subject of ongoing scientific research and investigation.

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  • 9. 

    Listed below are two correct reasons for why dark matter and dark energy are called "dark." Mark two (2) correct answers.

    • Scientists know that the dark matter and dark energy absorb all light in the visible spectrum, which means they are black in color.

    • Dark matter and dark energy cannot be seen or detected directly (only indirectly).

    • The existence of dark matter and dark energy is inferred from observed effects -- not by seeing them.

    Correct Answer(s)
    A. Dark matter and dark energy cannot be seen or detected directly (only indirectly).
    A. The existence of dark matter and dark energy is inferred from observed effects -- not by seeing them.
    Explanation
    Dark matter and dark energy are called "dark" because they cannot be seen or detected directly, only indirectly. Their existence is inferred from observed effects rather than being directly observed.

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  • 10. 

    We live in the Milky Way galaxy.  Yet the Milky Way is not the most common type of galaxy.   Choose below the ways that the Milky Way differs from the most common type of galaxy in the universe. Mark all four (4) correct answers.

    • The most common type of galaxy in the universe is the elliptical galaxy, but the Milky Way is a spiral galaxy.

    • Elliptical galaxies are spherical or ellipse-shaped. The Milky Way is flattened and has spiral arms.

    • Most (but not all) elliptical galaxies are dwarfs that contain fewer than one million stars; the Milky Way and most spiral galaxies are large. The Milky Way contains about 400 billion stars.

    • The Milky Way is the only galaxy scientists know of that has living organisms.

    • The Milky Way is smaller than most elliptical galaxies.

    Correct Answer(s)
    A. The most common type of galaxy in the universe is the elliptical galaxy, but the Milky Way is a spiral galaxy.
    A. Elliptical galaxies are spherical or ellipse-shaped. The Milky Way is flattened and has spiral arms.
    A. Most (but not all) elliptical galaxies are dwarfs that contain fewer than one million stars; the Milky Way and most spiral galaxies are large. The Milky Way contains about 400 billion stars.
    A. The Milky Way is the only galaxy scientists know of that has living organisms.

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  • Current Version
  • Oct 12, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 19, 2011
    Quiz Created by
    TeacherCory
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