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Nebulae
2 years ago by
craniumfire
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  • Question 1
    30 seconds
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    Q.

    "Nebula" is Latin for ___

    answer choices

    glow

    emmission

    gas

    cloud

  • Question 2
    30 seconds
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    Q.

    What are nebulae?

    answer choices

    groups of exploding stars

    clouds of gas and dust in space

    a collection of stars

    groups of stars forming a pattern

  • Question 3
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    Q.

    Stars, like our Sun, form from nebulae. How long ago did our Sun form?

    answer choices

    4.6 million years ago

    46 million years ago

    4.6 billion years ago

    46 billion years ago

  • Question 4
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    Q.

    A cloud of gas that has been excited by light from a nearby star is called ___

    answer choices

    a reflection nebula

    an emission nebula

    a lit nebula

    a glowing nebula

  • Question 5
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    Q.

    In an emission nebula, what is the predominant color of the glow from hydrogen?

    answer choices

    red

    yellow

    blue

    green

  • Question 6
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    Q.

    In an emission nebula, what is the predominant color of the glow from oxygen?

    answer choices

    red

    yellow

    blue

    green

  • Question 7
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    Q.

    Compared to a typical nebula, how much more dense is the air we breathe?

    answer choices

    ten times more dense

    a thousand times denser

    a trillion times denser

    a thousand trillion times denser

  • Question 8
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    Q.

    Dust clouds that reflect the light of nearby bright massive stars are called ___

    answer choices

    mirror nebulae

    emission nebulae

    reflection nebulae

    excited nebulae

  • Question 9
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    Q.

    Reflection nebulae are composed mainly of ___

    answer choices

    dust

    metallic gases

    hydrogen and helium

    ice crystals

  • Question 10
    30 seconds
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    Q.

    When astronomers talk about dust, they mean tiny grains with a width of about ___

    answer choices

    an angstrom

    a micrometer

    a millimeter

    a centimeter

  • Question 11
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    Q.

    "Polycyclic aromatic hydrocarbons" are better known as ___

    answer choices

    water crystals

    fog

    soot

    light gases

  • Question 12
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    Q.

    When visible light hits interstellar dust, what happens to blue and red light?

    answer choices

    blue light is scattered, red light is transmitted

    blue light is absorbed, red light is transmitted

    blue light is transmitted, red light is scattered

    blue light is scattered, red light is absorbed

  • Question 13
    30 seconds
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    Q.

    The dust surrounding the Pleiades star cluster is a ___

    answer choices

    emmision nebula

    absorption nebula

    transmission nebula

    reflection nebula

  • Question 14
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    Q.

    Small dust clouds that look like "fuzzy red-edged holes in space" are sometimes called ___

    answer choices

    atomic fog

    elemental attenuators

    molecular clouds

    red holes

  • Question 15
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    Q.

    The Orion Nebula is lit by four stars located in its heart, collectively called ___

    answer choices

    the Trifid Nebula

    the Wild Duck Cluster

    the Triangulum

    the Trapezium

  • Question 16
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    Q.

    A flattened disk of dense gas and dust surrounding a young newly forming star is called ___

    answer choices

    a protoplanetary disk

    a nursery nebula

    a glowing stratum

    a laminar slice

  • Question 17
    30 seconds
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    Q.

    When viewed in the infrared, what is revealed at the center of protoplanetary disks?

    answer choices

    supernova

    white dwarfs

    protostars

    black holes

  • Question 18
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    Q.

    Newly formed stars emit UV light that erodes the surrounding nebula in a process called ___

    answer choices

    fluorescent erosion

    photoevaporation

    lustrous corrosion

    photon decay

  • Question 19
    30 seconds
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    Q.

    Three giant towers of gas and dust in the Eagle Nebula have been called ___

    answer choices

    the Elephant Salute

    the Pillars of Creation

    the Fingers of Cronus

    the Eagle's Wing

  • Question 20
    30 seconds
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    Q.

    The dark nebula in the constellation Orion that is shaped like a gigantic chess piece is called ___

    answer choices

    the Rook's Reprise

    the Queen's Gambit

    the Horsehead Nebula

    the Bishop Nebula

  • Question 21
    30 seconds
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    Q.

    Clouds of dust that look dark to the human eye are actually glowing if you observe them in ___

    answer choices

    x-ray wavelengths

    the extreme ultraviolet

    the near ultraviolet

    the far infrared

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