WorksheetsStars, Galaxies, and the Universe
Total questions: 24
Worksheet time: 24mins
Name
Class
Date
1.
Scientists think that the universe will
a)
end someday
b)
expand forever
c)
eventually shrink
d)
expand and shrink
2.
What does a star’s color indicate?
a)
size
b)
age
c)
temperature
d)
shape
3.
The H-R diagram shows the relationship between a star’s surface temperature and its
a)
absolute magniture
b)
apparent magnitude
c)
size
d)
shape
4.
Which of the following is the hottest?
a)
red giant superstar
b)
small, white dwarf
c)
main-sequence yellow star
d)
main-sequence blue star
5.
According to the big bang theory, the universe is about how old?
a)
470 billion
b)
500 billion
c)
4.7 billion
d)
13.7 billion
6.
Scientists think that the Milky Way probably is
a)
a spiral galaxy
b)
an elliptical galaxy
c)
an irregular galaxy
d)
a nebula
7.
Which of the following is the largest?
a)
nebula
b)
galaxy
c)
neutron star
d)
globular cluster
8.
On what part of the modern H-R diagram do cool, bright, red stars appear?
a)
top right
b)
bottom right
c)
bottom left
d)
top left
9.
What is one way scientists use to calculate the age of the universe?
a)
measure the distance from Earth to nearby stars
b)
measure the distance from Earth to various galaxies
c)
measure the distance from Earth to the sun
d)
measure the size of various galaxies
10.
Why do black lines appear on an absorption spectrum?
a)
Black lines appear where colors of light are absorbed by a star’s atmosphere.
b)
Black lines appear where a star’s atmosphere emits different colors of light.
c)
Black lines appear to indicate colors not found in a star.
d)
Black lines appear where gases are absorbed by a star’s atmosphere.
11.
What do the pattern of lines in a star’s absorption spectrum represent?
a)
the star's color
b)
some of the elements in the star’s atmosphere
c)
all of the elements in the star’s atmosphere
d)
the elements in the star’s core
12.
Elliptical galaxies and the halos of spiral galaxies contain groups of stars called
a)
globular clusters
b)
open clusters
c)
nebulae
d)
neutron stars
13.
According to the big bang theory, what filled the universe after the original explosion?
a)
nebulae
b)
open clusters
c)
globular clusters
d)
cosmic background radiation
14.
The universe is organized according to
a)
a random pattern
b)
a loosely arranged structure
c)
a rigid and complex pattern
d)
no pattern or structure
15.
What are the three major types of galaxies identified by Edwin Hubble?
a)
spiral, triangular, irregular
b)
spiral, elliptical, irregular
c)
spiral, triangular, elliptical
d)
triangular, elliptical, irregular
16.
Why do scientists study distant galaxies to learn about early galaxies?
a)
Distant galaxies are just beginning to form, so they are very similar to early galaxies.
b)
Distant galaxies have not changed as much as close galaxies, so they are the most similar to early galaxies.
c)
Distant galaxies share many characteristics with early galaxies.
d)
Because it takes a long time for light to travel through space, looking at distant galaxies shows what early galaxies looked like.
17.
What type of star has used up all of its hydrogen and is the leftover center of an older star?
a)
red giant
b)
supernova
c)
white dwarf
d)
main sequence
18.
the study of the origin, structure, and future of the universe
a)
black hole
b)
main sequence star
c)
super giant
d)
cosmology
19.
the distance that light travels in one year; about 9.5 trillion kilometers
a)
supernova
b)
apparent magnitude
c)
light-year
d)
quasar
20.
a distant, starlike source of light
a)
absolute magnitude
b)
quasar
c)
main sequence
d)
cosmology
21.
the brightest star as seen from Earth
a)
apparent magnitude
b)
quasar
c)
absolute magnitude
d)
black hole
22.
the diagonal pattern on the H-R diagram where most stars appear
a)
absolute magnitude
b)
main sequence
c)
black hole
d)
light-year
23.
an object so massive and dense that not even light can escape its gravitational pull
a)
quasar
b)
main sequence
c)
cosmology
d)
black hole
24.
the brightness of a star at a distance of 32.6 light-years from Earth
a)
cosmology
b)
absolute magnitude
c)
apparent magnitude
d)
main sequence
100 %
