The Space Quiz: How Well You Know?

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| By Mahikasharma
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Mahikasharma
Community Contributor
Quizzes Created: 1 | Total Attempts: 463
Questions: 10 | Attempts: 463

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The Space Quiz: How Well You Know? - Quiz


Questions and Answers
  • 1. 

    What holds a galaxy together?

    • A.

      Gravity

    • B.

      Planets

    • C.

      Stars

    • D.

      None of the above

    • E.

      By Mahika

    Correct Answer
    A. Gravity
    Explanation
    Gravity is the force that holds a galaxy together. It is the force of attraction between all objects with mass, and it plays a crucial role in the formation and structure of galaxies. The gravitational pull between stars, planets, and other celestial bodies within a galaxy keeps them bound together, preventing them from drifting apart. Without gravity, galaxies would not be able to maintain their shape and structure, and the stars and planets within them would disperse into space.

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  • 2. 

    What happens when a star dies?

    • A.

      Gas

    • B.

      Another star

    • C.

      Supernova

    • D.

      None of the above

    • E.

      By Mahika

    Correct Answer
    C. Supernova
    Explanation
    When a star dies, it undergoes a supernova. A supernova is a powerful explosion that occurs when a massive star exhausts its nuclear fuel and collapses under its own gravity. This explosion releases an enormous amount of energy and results in the ejection of outer layers of the star into space. The remaining core may collapse further to form a neutron star or a black hole. Therefore, the correct answer is "Supernova."

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  • 3. 

    Why do stars explode?

    • A.

      To old

    • B.

      No more fuel

    • C.

      For no reason

    • D.

      None of the above

    • E.

      By Mahika

    Correct Answer
    B. No more fuel
    Explanation
    Stars explode because they run out of fuel. As a star burns its fuel, it produces energy through nuclear fusion. This energy counterbalances the gravitational force pulling the star inward. However, once the fuel is depleted, there is no longer enough energy to counteract gravity, causing the star to collapse inward. This collapse can trigger a massive explosion known as a supernova, releasing an enormous amount of energy and creating heavy elements in the process.

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  • 4. 

    Which of these happens inside a galaxy?

    • A.

      Nothing

    • B.

      Planets die

    • C.

      Stars fall

    • D.

      None of the above

    • E.

      By Mahika

    Correct Answer
    D. None of the above
    Explanation
    Inside a galaxy, planets do not die and stars do not fall. Galaxies are vast systems of stars, planets, gas, and dust held together by gravity. Planets orbit around stars, and stars remain relatively stable in their positions within the galaxy. Therefore, the correct answer is "None of the above."

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  • 5. 

    What is the smallest star?

    • A.

      Red dwarf star

    • B.

      Neutron star

    • C.

      Porto star

    • D.

      None of the above

    • E.

      By James

    Correct Answer
    A. Red dwarf star
    Explanation
    A red dwarf star is the smallest star. Red dwarf stars are small and cool compared to other types of stars, such as neutron stars and Porto stars. They have a mass less than half that of the Sun and a surface temperature of less than 4,000 Kelvin. Despite their small size, red dwarf stars are the most common type of star in the universe. They have a long lifespan, burning their fuel at a slow rate, which allows them to exist for billions of years.

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  • 6. 

    Which of the following best describes the Oort Cloud?

    • A.

      A spherical shell of icy objects believed to surround the Solar System, serving as a reservoir for long-period comets. 

    • B.

      A dense region of gas and dust providing the raw materials for star formation in the Milky Way galaxy.

    • C.

      A collection of asteroid and meteoroid debris found between the orbits of Mars and Jupiter, known as the asteroid belt.

    • D.

      The boundary of the heliosphere where the solar wind is slowed by the pressure of interstellar medium.

    Correct Answer
    A. A spherical shell of icy objects believed to surround the Solar System, serving as a reservoir for long-period comets. 
    Explanation
    The Oort Cloud is theorized to be a distant spherical shell surrounding the Solar System, composed of icy bodies and fragments believed to be the source of long-period comets that occasionally enter the inner Solar System. It is named after the Dutch astronomer Jan Oort, who hypothesized its existence. The Oort Cloud is thought to extend from about 5,000 astronomical units (AU) to as far as 100,000 AU from the Sun, marking the outer edge of the Solar System's gravitational influence.

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  • 7. 

    How many stars are out there?

    • A.

      As much as there are grains of star on earth

    • B.

      More than all the grains of sand on earth

    • C.

      As much as all over earth

    • D.

      None of the above

    • E.

      By James

    Correct Answer
    B. More than all the grains of sand on earth
    Explanation
    The correct answer suggests that there are more stars in the universe than there are grains of sand on Earth. This implies that the number of stars is incredibly vast and exceeds the amount of sand particles on our planet.

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  • 8. 

    How do galaxies move?

    • A.

      They don't move

    • B.

      A mile a month

    • C.

      They move thousands of miles per second

    • D.

      None of the above

    • E.

      By Eigo

    Correct Answer
    C. They move thousands of miles per second
    Explanation
    Galaxies move thousands of miles per second. This is supported by scientific evidence that shows galaxies are constantly moving and expanding within the universe. Through observations and measurements, astronomers have determined that galaxies have a variety of motions, including rotational motion within themselves and motion relative to other galaxies. These movements are often caused by gravitational forces exerted by nearby galaxies or the overall expansion of the universe. Therefore, it can be concluded that galaxies do move at incredibly high speeds, not at a mile a month or by any other options provided.

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  • 9. 

    How big is a galaxy?

    • A.

      All the same

    • B.

      Some galaxies are big some are small

    • C.

      Galaxies are always changing sizes

    • D.

      None of the above

    • E.

      By Eigo

    Correct Answer
    B. Some galaxies are big some are small
    Explanation
    Galaxies come in various sizes, meaning that some are big while others are small. This is due to factors such as the amount of matter and the rate of star formation within each galaxy. Therefore, the statement "Some galaxies are big, some are small" accurately describes the size diversity among galaxies.

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  • 10. 

    How long does it take for Andromeda to reach us?

    • A.

      1 million years

    • B.

      3 million years

    • C.

      2 million years

    • D.

      None of the above

    • E.

      By Eigo

    Correct Answer
    C. 2 million years
    Explanation
    Andromeda is the closest spiral galaxy to the Milky Way. It is currently moving towards us at a speed of about 110 kilometers per second. Based on its current velocity and distance, it is estimated that it will take approximately 2 million years for Andromeda to reach us.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Apr 05, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 14, 2015
    Quiz Created by
    Mahikasharma
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