WorksheetsChapter 24 Review
Total questions: 32
Worksheet time: 16mins
The nearest stars have the _________________ parallax angle.
largest
smallest
The parallax angles of very distance stars are __________________
very large
very small
too small to measure
can be measured without the use of telescopes
A better unit to express stellar distances is the:
meter
kilometer
mile
light year
Three factors controlling the brightness of a star as seen from Earth are:
how big it is, how far away it is, and how hot it is
how fast it spins, how big it is, how close it is to another star
how close it is to another star, how fast it spins, and where in the galaxy it is located
how big it is, how hot it is, and how fast it spins
Most stars have an absolute magnitude between:
-10 and -5
-5 and 15
-20 and 20
-25 and 0
very hot stars with surface temperatures above 30,000 K appear:
blue
red
green
yellow
maroon
cooler stars with surface temperatures generally less than 3,000 K appear:
blue
red
green
yellow
violet
Determination of the mass of binary stars is based on:
each stars' distance from the center of mass
each stars' magnitude
whether or not the stars or moving away or toward the Earth
each stars' chemical composition
The two types of bright nebula are ___________________________ and __________________________.
reflection nebulae and emission nebulae
refraction nebulae and absorption nebulae
contraction nebulae and elliptical nebulae
expansion nebulae and converse nebulae
The greater a star's luminosity, the ____________________ the star's diameter.
greater
lesser
The death of a high-mass star will lead to:
a black hole or neutron star
a main sequence star
a white dwarf
a black dwarf
The milky way is a __________________ galaxy.
spiral
irregular
barred
elliptical
According to Hubble's law, the universe seems to be currently __________________.
shrinking
expanding
staying the same
The distance to stars can be determined from ________, the slight back-and-forth shifting in the position of
a nearby star due to the orbital motion of Earth.
emission nebulae
stellar parallax
fluorescence
stellar mass
When studying binary pairs, the most massive star would be found
closest to the center of mass.
furthest from the center of mass.
at an equal distance from the center of mass as the smaller star.
devouring the smaller star
The Sun belongs to this class of stars.
black hole
main-sequence star
red giant
white dwarf
On an H-R diagram, about 90 percent of the stars are
main sequence stars
white dwarfs
supergiants
giants
The two properties of a star that are plotted on an H-R diagram are
size and temperature
size and distance
brightness and temperature
distance and brightness
Dark nebulae appear dark because they
are not close enough to a bright star
are in a pure vacuum
are under low pressure
absorb ultraviolet radiation
Which force is most responsible for the formation of a star?
magnetic
nuclear
gravity
light pressure
Most of the known galaxies are classified as
spiral
elliptical
barred
irregular
The best evidence for an expanding universe is
the universal red shift
the fact that nothing is older than 5 billion years
the realization that if stars explode, the universe does as well
the decrease in the speed of light at large stellar distances
Hubble's law states that galaxies are receding from us at a speed proportional to their
size
quasars
distance
mass
These stars have the shortest life-spans:
high-mass stars
medium-mass stars (Sun-like)
low-mass stars
all stars have about the same life-span
Gaseous masses that consist largely of hydrogen. They absorb ultraviolet radiation emitted by embedded or nearby hot stars, which is then reradiated.
emission nebulae
reflection nebulae
dark nebulae
white dwarf
black dwarf
Likely composed of relatively dense clouds of large particles called interstellar dust that reflect light of nearby stars.
emission nebulae
reflection nebulae
dark nebulae
white dwarf
black dwarf
Appearing as opaque objects silhouetted against a bright background, they occur when a cloud of interstellar material is not close enough to a bright star to be illuminated.
emission nebulae
reflection nebulae
dark nebulae
white dwarf
black dwarf
After a white dwarf cools and dims, it turns into this small, cold, burned out ember in space.
emission nebulae
reflection nebulae
dark nebulae
white dwarf
black dwarf
Identify the pictured galaxy
elliptical
barred spiral
spiral
irregular
Identify the pictured galaxy
elliptical
barred spiral
spiral
irregular
Identify the pictured galaxy
elliptical
barred spiral
spiral
irregular
Identify the pictured galaxy
elliptical
barred spiral
spiral
irregular
