Layers Of The Sun Quiz

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  • 1/10 Questions

    Which of the following is NOT a layer of the Sun's atmosphere?

    • Photosphere 
    • Chromosphere 
    • Corona 
    • Core
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About This Quiz

This is a quiz that represents some of the content covered in the final test. These questions are considered easy.

Layers Of The Sun Quiz - Quiz

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  • 2. 

    What layer of the Sun is the hottest?

    • Convective zone

    • Radiative zone

    • Photosphere

    • Core

    Correct Answer
    A. Core
    Explanation
    The core of the Sun is the hottest layer. It is the central region where nuclear fusion occurs, releasing enormous amounts of energy in the form of heat and light. The temperature in the core can reach up to 27 million degrees Fahrenheit (15 million degrees Celsius), making it the hottest part of the Sun.

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  • 3. 

    What is the outermost layer of the sun?

    • Convective zone

    • Radiative zone

    • Photosphere

    • Core

    Correct Answer
    A. Photosphere
    Explanation
    The outermost layer of the sun is called the photosphere. This is the layer that emits the visible light that we see from Earth. It is also the layer where sunspots, solar flares, and other solar phenomena occur. The photosphere has a temperature of about 5,500 degrees Celsius and is composed mainly of hydrogen gas. It is the layer that we commonly refer to as the "surface" of the sun, even though it is not a solid surface like the Earth's.

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  • 4. 

    Why can larger stars fuse larger atoms together?

    • They have a lower pressure so they are cooler

    • They have more hydrogen

    • They have a higher pressure so they have a higher temperature

    Correct Answer
    A. They have a higher pressure so they have a higher temperature
    Explanation
    Larger stars have a higher pressure due to their immense gravitational pull. This increased pressure leads to a higher temperature within the star. The higher temperature allows for the fusion of larger atoms because it provides the necessary energy to overcome the electrostatic repulsion between the positively charged nuclei. Thus, the higher pressure in larger stars results in a higher temperature, enabling the fusion of larger atoms.

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  • 5. 

    The hottest stars in the sky are large.  What color are most of these very hot stars?

    • Red

    • Blue

    • White

    Correct Answer
    A. Blue
    Explanation
    The hottest stars in the sky are large and emit a high amount of energy. This energy is produced by nuclear fusion reactions in their cores, causing them to emit a bluish-white light. This is due to the high temperature of these stars, which causes them to emit shorter wavelength light, resulting in a blue color. Therefore, most of these very hot stars appear blue in color.

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  • 6. 

    Why does nuclear fusion only happen in the core?

    • The core is very hot

    • The core is the coolest part

    • The core has the most hydrogen for fusion

    • The core is the largest part of the sun

    Correct Answer
    A. The core is very hot
    Explanation
    Nuclear fusion only happens in the core because it is very hot. Fusion occurs when atoms collide with enough energy to overcome the electrostatic repulsion between their positively charged nuclei. The high temperature in the core provides the necessary energy for these collisions to happen, allowing fusion reactions to take place.

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  • 7. 

    Our Sun will eventually die off.  What will it be at the point that it stops nuclear fusion?

    • Blue giant

    • Red supergiant

    • White dwarf

    • Red dwarf

    Correct Answer
    A. White dwarf
    Explanation
    When our Sun exhausts its nuclear fuel and stops nuclear fusion, it will transform into a white dwarf. A white dwarf is the final stage in the life cycle of a star like the Sun. It is a dense, hot, and compact stellar remnant that remains after the outer layers of the star are expelled into space. The core of the star collapses under its own gravity, while the outer layers form a planetary nebula. The white dwarf will gradually cool down over billions of years, eventually becoming a cold, dark object known as a black dwarf.

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  • 8. 

    Stars that are in the red giant region are considered ___________. (fill in the blank)

    • Young

    • Primordial

    • Old

    • Dead

    Correct Answer
    A. Old
    Explanation
    Stars that are in the red giant region are considered old because the red giant phase is a later stage in the evolution of a star. During this phase, the star has exhausted its core hydrogen fuel and has expanded and cooled down. This typically happens to stars that are nearing the end of their life cycle. Therefore, stars in the red giant region are generally older stars.

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  • 9. 

    Which of the following does not occur in nuclear fusion?

    • Energy is released

    • Mass is released

    • Mass is gained

    • Subatomic particles like protons and neutrons crash into each other

    Correct Answer
    A. Mass is gained
    Explanation
    In nuclear fusion, lighter atomic nuclei, such as hydrogen isotopes, combine to form a heavier nucleus, such as helium. This process releases a tremendous amount of energy, as some of the mass of the original nuclei is converted into energy according to Einstein's famous equation E=mc². The energy released powers stars like our Sun.

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  • 10. 

    What is the largest element the Sun will be able to make?

    • Hydrogen

    • Helium

    • Oxygen

    • Berylium

    Correct Answer
    A. Oxygen
    Explanation
    The Sun is a massive ball of gas, primarily composed of hydrogen and helium. Through the process of nuclear fusion, hydrogen atoms in the Sun's core combine to form helium. Eventually, when the Sun exhausts its hydrogen fuel, it will start fusing helium atoms to produce heavier elements like oxygen. Therefore, oxygen is the largest element the Sun will be able to make.

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  • Current Version
  • Nov 22, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 17, 2011
    Quiz Created by
    Psbreiding
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