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H. Stars Flashcards | StudBud
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H. Stars
H. Stars
26 terms
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StudBud Administration
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237 plays
Earth/Space Science Honors
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
Which stage do stars spend most of their lives?
main sequence
giants
supergiants
protostar
2
What is needed to calculate the absolute magnitude of a star?
color and temperature
apparent magnitude and distance from the Earth
apparent magnitude and composition
color and distance from the Earth
3
The magnitude a star seems to have as it is observed from the earth at night
apparent magnitude
luminosity
absolute magnitude
4
Which stars live the longest?
high mass stars
low mass stars
5
What happens to the material left over from the death of a star?
It becomes asteroids and comets.
It gets sucked into a black hole.
It mixes with other matter, eventually becoming another star
No one knows.
6
What is blackbody radiation?
what a blackbody emits if heated to the point of being blue
what a blackbody emits at thermal equilibrium
what a blackbody emits depending on its size
what a blackbody emits when exposed to a blackhole
7
Which stars are the hottest?
blue
red
orange
white
8
Which stars live the shortest?
low mass stars
high mass stars
9
Which would cause a disruption to power grids?
sunspot activity
a solar eclipse
solar flares
coronal turbulance
10
What happens when a new star begins to release energy?
It stops contracting and begins to shine
It condenses
It forms a protostar
Nuclear fusion begins
11
Where on an HR diagram are the coolest, dimmest stars?
upper left
lower left
upper right
lower right
12
Where on an HR diagram are the hottest, brightest stars?
upper right
lower right
lower left
upper left
13
The magnitude a star would have if it was relocated to a distance of 10 parsecs from the sun
luminosity
absolute magnitude
apparent magnitude
14
Which stars are the coolest?
white
orange
red
blue
15
Which attribute most influences the life and death of a star?
mass
solar radius
luminosity
position on an HR diagram
16
What kind of star is our Sun?
a red giant
a supergiant
a white dwarf
a main sequence star
17
Where on an HR diagram are the giants?
lower right
upper right
upper left
lower left
18
An HR diagram has which on its X and Y axis?
luminosity, spectral type
color, temperature
color, luminosity
luminosity, temperature
19
Which is the same as brightness?
color
sparkle
glare
luminosity
20
In a new star, at what temperature does nuclear fusion begin?
15 thousand degrees celsius
15 degrees celsius
15 billion degrees celsius
15 million degrees celsius
21
What is a binary star system?
two pairs of stars orbiting each other
a star orbited by a gas giant planet
a star appearing blue in the sky
two stars orbiting each other
22
Which unit is used to measure stars?
astronomical unit
solar radius
kilometer
light year
23
Which is NOT a possible outcome for a star's final stage?
nebula
neutron star
white dwarf
black hole
24
Why does mass determine how a star ends?
mass determines solar radii
mass determines temperature
mass does not determine how a star ends
mass determines size
25
How does a star begin?
as electromagnetic radiation
as a high density nebula
as random matter in space
as a black hole
26
Where on an HR diagram are the hottest, dimmest stars?
upper left
lower right
upper right
lower left
