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Earth Science Chapter 30 and 31 Flashcards | StudBud
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Earth Science Chapter 30 and 31
Earth Science Chapter 30 and 31
30 terms
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A #EarthScience quiz to review terms and concepts related to stars and galaxies.
Flashcards
30 cards
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Questions
30
Answers
1
Minimum to maximun sunspots over a period of 22.4 years
solar wind
solar cycle
spectrum
prominence
2
Gas flows outward at high speeds and forms the
solar wind
photosphere
solar prominence
solar storm
3
The fact that nearby stars shift in position as observed from Earth is called
shafting
precision
parallax
parsec
4
The Sun is the largest object in our
solar system
orbit
universe
Milky Way
5
The top layer of the Sun's atmosphere is the
chromosphere
solar wind
photosphere
corona
6
The __________ inside the star determines the star's energy output, or luminosity.
oxygen
mass
temperature
color
7
Constellations are
stars over Greece
the brightest stars
found only in the northern hemisphere
Groups of stars named after animals, mythological creatures
8
Ancient Greek classification system based on how bright a star appears to be
apparent magnitude
constellation
absolute magnitude
luminosity
9
Above the visible layer of the Sun is the
photosphere
chromosphere
corona
prominence
10
The visible surface of the Sun is called the
prominence
chromosphere
photosphere
corona
11
Combining lightweight nuclei into heavier nuclei
reaction
fission
fusion
mixture
12
During a supernova
the core continues to fuse helium
outer portion of a star is blown off in a massive explosion
infalling gas remains trapped in the core
the star is in hydrostatic equilibrium
13
Study of the universe, including its current nature, it's origin, and its evolution is called
Big Bang Theory
astrology
cosmology
Steady State Theory
14
The theory that the universe began as a point and has been expanding ever since
Single Point Theory
Big Bang Theory
cosmology
Steady State Theory
15
The Sun's ________ controls the motion of the planets.
temperature
luminosity
mass
solar wind
16
Unit of measurement used to express the energy emitted per second.
watt
fusion
lumen
hertz
17
Galaxies that are not flattened into disks and do not have spiral arms are called
elliptical galaxies
dwarf galaxies
barred elliptical galaxies
nebular galaxies
18
Disk-like galaxies with spiral arms are divided into which following subclasses?
loose spirals and flat spirals
flat spirals and barred spirals
normal spirals and flat spirals
normal spirals and barred spirals
19
For a star to be stable, it must have
mass
solar wind
hydrostatic equilibrium
temperature
20
Cloud of interstellar gas and dust that collapses on itself to form a new star.
black hole
main sequence
globular cluster
nebula
21
Energy output from a surface of a star per second
apparent magnitude
spectrum
luminosity
watt
22
Astronomers conclude that there are about 100 billion stars within the disk of our
Kuiper Belt
galaxy
universe
solar system
23
Stars on the main sequence produce energy by fusing hydrogen into
oxygen
carbon
helium
iron
24
Visible light arranged according to wavelengths.
luminosity
main sequence
spectrum
brightness
25
Ursa Major, or the big dipper, is an example of a
constellation that can only be seen in the fall
constellation that can only be seen in the winter
Constellation that can only be seen in the summer
circumpolar constellation
26
Section of the H-R diagram into which about 90 percent of stars fall
absolute magnitude
main sequence
spectrum
nebula
27
A star that begins with a mass 8 to 20 times that of a Sun's mass will
undergo the same evolution as the sun
become a white dwarf
remain at the same stage and not evolve
will come to a violent end
28
Small, massive, dense object that has a gravity so immense that nothing can escape it.
super nova
neutron star
white dwarf
black hole
29
Galaxies that do not fit into the spiral or elliptical classifications are called
dwarf galaxies
irregular galaxies
Hubble galaxies
barred galaxies
30
Brightness of an object if it was placed at a distance of 10 pc
apparent magnitude
main sequence
absolute magnitude
luminosity
