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Star and Sun Quiz Flashcards | StudBud
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Star and Sun Quiz
Star and Sun Quiz
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Stars and the Sun
Flashcards
23 cards
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Questions
23
Answers
1
When the outward force due to fusion balances the inward force of gravity...
parallax
stasis
equilibrium
nova
2
Stars appear to move in circular paths through the sky because...
Earth orbits the sun
Earth rotates on its axis
the stars orbit Polaris
the Milky Way is a spiral galaxy
3
The change in position of a nearby star as seen from different points on Earth's orbit is...
blue shift
red shift
parallax
Doppler effect
4
Which type of star is most likely to be found on the main sequence?
yellow star
neutron star
red supergiant
white dwarf
5
How do stellar
spectra
provide evidence that stars are actually moving?
light separates into different wavelengths
dark line spectra reveal a star's composition
long exposure photos show curved trails
Doppler shifts occur in the star's spectrum
6
The part of the sun that is normally visible from Earth is the...
radiative zone
photosphere
corona
core
7
Northern lights and southern lights are other names for
granulations
eclipses
prominences
auroras
8
A nuclear reaction in which atomic nuclei combine is called...
fission
fusion
magnetism
granulation
9
Which layer of the sun has the densest material?
the convection zone
the core
the radiative zone
the corona
10
The observed change in the frequency of a wave when either the source or observer is moving...
apparent magnitude
parallax
absorption spectra
Doppler effect
11
Which of the following choices lists the colors of stars from hottest to coolest...
blue, white, yellow, orange, red
red, yellow, orange, white, blue
orange, red, white, blue, yellow
yellow, orange, red, blue, white
12
What happens to main sequence stars (the sun) when energy from fusion is no longer available?
they contract and turn into neutron stars
they expand and become supergiants
they collapse and become white dwarfs
they switch to fission reactions
13
According to Einstein's theory of relativity, in the formula E=mc
2
, the c stands for
circumstellar
the length of time
the speed of light
core
14
The heaviest element formed in the core of a star is...
helium
carbon
iron
nitrogen
15
The most common element in most stars is...
sodium
hydrogen
oxygen
helium
16
A main-sequence star generates energy by fusing...
hydrogen into helium
helium into carbon
nitrogen into carbon
nitrogen into iron
17
What accounts for different stars being seen in the sky during different seasons of the year?
stellar motion around Polaris
Earth's revolution around the sun
position north or south of the equator
Earth's rotation on its axis
18
What is apparent magnitude?
the brightness of a star as it appears from Earth
the brightness of the moon as it appears from Earth
the numerical size of a star
the true brightness of a star
19
Sunspots are regions of...
high temperature
intense magnetism
lighter color
the core
20
The surface temperature of a star is plotted against its luminosity on the
cosmic background radiation map.
H-R diagram.
parallax graph.
Doppler effect.
21
The number of hydrogen atoms that fuse to form a helium atom is...
eight
two
four
six
22
A nebula begins the process of becoming a protostar when the nebula...
begins to shrink, increase its spin and temperature
develops a red shift
explodes as a nova
changes color from red to blue
23
What are binary stars?
pairs of stars held motionless by gravity
stars like the sun and Earth
stars with two poles
pairs of revolving stars held together by gravity
