Astronomy Quiz For 9th-grade

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  • 1/15 Questions

    Units of Distance in Space is measured in 

    • Kilowatt Hours (KWH)
    • Light Years (LY)
    • Gigameters (GM)
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About This Quiz

Astronomy is the study of celestial objects such as planets, comets, stars, etc. Are you in ninth grade and have just read astronomy and want to review what you have already learned? These 9th-grade astronomy questions and facts will help you through the process; give them a shot and keep an eye out for others like them.
From identifying planets and understanding their unique features to exploring the life cycles of stars, this quiz promises an engaging exploration of introductory astronomy concepts. Challenge yourself with inquiries on galaxies, the electromagnetic spectrum, and the tools astronomers use to unravel the mysteries of space.

Astronomy Quiz For 9th-grade - Quiz

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  • 2. 

    What is the Big Bang Theory? 

    • A theory suggesting our Universe came to be throughout a massive explosion, expanding ever-outwards after being confined to a single atom for billions of years.

    • A TV show

    • A Theory suggesting that Earth was created in a big explosion about 3 billion years ago.

    Correct Answer
    A. A theory suggesting our Universe came to be throughout a massive explosion, expanding ever-outwards after being confined to a single atom for billions of years.
    Explanation
    The Big Bang Theory is a scientific theory that proposes that the universe originated from a massive explosion. According to this theory, the entire universe was initially confined to a single atom-like state for billions of years, and then it underwent a rapid expansion, continuously expanding outward. This theory provides an explanation for the origin and evolution of the universe as we know it today.

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  • 3. 

    A galaxy is a collection of gas, dust, stars, and planets held together by 

    Correct Answer
    Gravity, Gravitational force
    Explanation
    A galaxy is a vast system that consists of various components such as gas, dust, stars, and planets. These components are held together by the force of gravity. Gravity is a fundamental force of nature that attracts objects towards each other. In the case of a galaxy, the gravitational force between its components keeps them bound together, preventing them from drifting apart. Therefore, gravity is the force responsible for holding a galaxy intact.

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  • 4. 

    There are three types of galaxies: Spiral, Elliptical, and 

    Correct Answer
    Irregular , irregular
    Explanation
    Galaxies are generally classified into three main types: Spiral, Elliptical, and Irregular. Spiral galaxies, like our Milky Way, have a flat, rotating disk with spiral arms. Elliptical galaxies have a more rounded shape and lack the defined structure of spirals. Irregular galaxies do not fit into either of these categories and have no specific shape, often appearing chaotic in structure. These three types encompass the majority of observed galaxies.

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  • 5. 

    Meteors, Meteorites, and Meteriods are all the same thing.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Meteors, meteorites, and meteoroids are not the same thing. A meteor is a streak of light that is produced when a meteoroid enters the Earth's atmosphere and burns up. A meteorite is a meteoroid that survives its passage through the Earth's atmosphere and lands on the Earth's surface. A meteoroid is a small rocky or metallic object that orbits the Sun. Therefore, meteors, meteorites, and meteoroids are related but refer to different stages of the same phenomenon.

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  • 6. 

    The Moon is a Satelite. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The Moon is indeed a satellite. It is the Earth's only natural satellite and it orbits around the Earth. Satellites are objects that revolve around a larger celestial body, and the Moon fits this definition as it revolves around the Earth.

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  • 7. 

    When an object is moving closer to us, it appears red-shifted in colour. When an object is moving away from us, it appears blue-shifted in colour. 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    When an object is moving closer to us, it appears blue-shifted in color due to the Doppler effect. This means that the wavelengths of the light emitted by the object are compressed, causing a shift towards shorter wavelengths, which our eyes perceive as a shift towards the blue end of the spectrum. Conversely, when an object is moving away from us, it appears red-shifted in color because the wavelengths of the light are stretched, resulting in a shift towards longer wavelengths, which our eyes perceive as a shift towards the red end of the spectrum. Therefore, the given statement is false.

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  • 8. 

    Our Universe consists of only about 4% atoms. How much of it is Dark Matter and Dark Energy?

    • 80% Dark Matter, 16% Dark Energy

    • 68% Dark Energy, 27% Dark Matter

    • 94% Dark Energy, 2% Dark Matter

    • What is Dark Matter and Energy?

    Correct Answer
    A. 68% Dark Energy, 27% Dark Matter
    Explanation
    Approximately 68% of the cosmos is composed of dark energy, while dark matter constitutes around 27%. The remaining portion, which encompasses everything on Earth and all observable matter using our instruments, amounts to less than 5% of the entire universe.

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  • 9. 

    Nuclear Fusion occurs during the Protostar phase in a star's life.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Nuclear fusion does not occur during the Protostar phase in a star's life. The Protostar phase is the early stage of a star's formation, where gravitational collapse causes the core temperature to rise. Nuclear fusion, which is the process of combining atomic nuclei to release energy, occurs in the main sequence phase of a star's life, after the Protostar phase. This is when the star has reached a stable state and is fusing hydrogen into helium in its core. Therefore, the statement is false.

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  • 10. 

    It is believed that this type of galaxy is often the oldest and biggest. 

    • Irregular

    • Spiral

    • Elliptical

    • Milky Way

    Correct Answer
    A. Elliptical
    Explanation
    Elliptical galaxies are often considered to be the oldest and biggest type of galaxy. They are characterized by their smooth, oval-shaped appearance and lack of distinct spiral arms. These galaxies are believed to have formed early in the universe's history through mergers and interactions with other galaxies, resulting in their elliptical shape. The absence of ongoing star formation in elliptical galaxies further supports the idea that they are older compared to other types of galaxies.

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  • 11. 

    Which of the following phenomena is responsible for the fact that we always see the same side of the Moon from Earth?

    • Lunar eclipse

    • Tidal locking

    • Precession

    • Retrograde motion

    Correct Answer
    A. Tidal locking
    Explanation
    The phenomenon known as tidal locking is responsible for the Moon always showing the same face to Earth. This occurs because the Moon's rotation period (the time it takes to rotate once on its axis) is equal to its orbital period (the time it takes to orbit the Earth). As a result, one hemisphere of the Moon is always facing Earth. A lunar eclipse (A) occurs when the Earth comes between the Sun and the Moon, precession (C) is the slow change in the orientation of a planet's axis, and retrograde motion (D) refers to the apparent backward motion of planets from Earth's perspective.

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  • 12. 

    Check all of the following star life phases that can occur during a massive star's life (100x the sun) , after the supernova. 

    • Black Hole

    • White Dwarf

    • Red Supergiant

    • Neutron Star

    • Big Bang

    Correct Answer(s)
    A. Black Hole
    A. Neutron Star
    Explanation
    During a massive star's life, after a supernova, two possible star life phases can occur: Black Hole and Neutron Star. A Black Hole is formed when the core of a massive star collapses under its own gravity, creating a region of spacetime with extremely strong gravitational forces. A Neutron Star is formed when the core of a massive star collapses, but not enough to form a black hole, resulting in a dense and compact star composed mainly of neutrons. The other options listed, such as White Dwarf, Red Supergiant, and Big Bang, do not occur after a supernova in the life of a massive star.

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  • 13. 

    Select any of the following that are part of the Electromagnetic Spectrum 

    • Gamma Rays

    • String Rays

    • Ultraviolet Light

    • Infrared Light

    • Hypnotic Light

    • Visible Light

    • Radio Waves

    • Microwaves

    Correct Answer(s)
    A. Gamma Rays
    A. Ultraviolet Light
    A. Infrared Light
    A. Visible Light
    A. Radio Waves
    A. Microwaves
    Explanation
    The correct answer includes Gamma Rays, Ultraviolet Light, Infrared Light, Visible Light, Radio Waves, and Microwaves. These are all part of the electromagnetic spectrum, which is a range of wavelengths or frequencies of electromagnetic radiation. Gamma rays have the shortest wavelength and highest frequency, while radio waves have the longest wavelength and lowest frequency. Ultraviolet light, infrared light, and visible light fall in between these extremes.

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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
  • Feb 24, 2025
    Quiz Edited by
    ProProfs Editorial Team
  • May 18, 2012
    Quiz Created by
    Ilikepietumblr

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