Stars: Question Preview (ID: 114)

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Gas and dust in interstellar nebulae can form
a) stars
b) comets
c) meteors
d) asteroids

What element is the main component of most stars?
a) nitrogen
b) iron
c) hydrogen
d) oxygen

A star might be much brighter than it appears to be. This is called the star's absolute magnitude. The difference in apparent magnitude and absolute magnitude is due primarily to the star's
a) surface temperature
b) motion through the universe
c) diameter
d) distance from Earth

What is the first stage in the life cycle of a star?
a) black hole
b) dwarf star
c) main-sequence
d) stellar nebula

Which layer of the sun is most dense?
a) chromosphere
b) photosphere
c) core
d) corona

What type of galaxy is our Milky Way?
a) irregular
b) spiral
c) elliptical
d) supergiant

Which property of a star tells us the composition of that Star?
a) absolute magnitude
b) apparent magnitude
c) spectrum
d) luminosity

Which of these facts is the best supporting evidence that the universe is expanding?
a) the stars vary in chemical composition
b) the galaxies are moving away from each other
c) the galaxies can spin to form eddies
d) the universe is filled with galaxies of different sizes

Which of the following is the correct order of stages in the life cycle of our Sun?
a) nebula, main-sequence, giant, white dwarf
b) nebula, giant, main-sequence, white dwarf
c) white dwarf, nebula, main-sequence, giant
d) nebula, white dwarf, main-sequence, giant

A star that explodes is known as a
a) supernova
b) supergiant
c) nebula
d) main-sequence

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