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Worksheets8.8A Components of the Universe
Total questions: 25
Worksheet time: 24mins
Name
Class
Date
1.
A system of stars, gas, dust, and dark matter bound together by gravity is called -
a)
an asteroid
b)
a nebula
c)
a galaxy
d)
a moon
2.
Stars are made mostly of which two elements?
a)
Selenium and sodium
b)
Astatine and arsenic
c)
Chlorine and cesium
d)
Hydrogen and helium
3.
A large celestial body made of gases that emits light due to nuclear reactions is called -
a)
a galaxy
b)
a nebula
c)
a comet
d)
a star
4.
An interstellar cloud of dust and gases that serves as a location for the formation of new stars is -
a)
a meteor
b)
a planet
c)
a galaxy
d)
a nebula
5.
Galaxies are classified into all of the following types by their shapes EXCEPT -
a)
spiral
b)
elliptical
c)
oblong
d)
crescent
6.
The Hertzsprung-Russell diagram is provided, which is used for classifying stars based on the relationship between their brightness and their temperature and color. Regulus belongs in which of the following classifications?
a)
Super Giants
b)
Giants
c)
Main Sequence Stars
d)
White Dwarfs
7.
Which of the following is an accurate description of the relationship between components of the universe?
a)
Stars always contain galaxies
b)
Galaxies contain many stars
c)
Stars contain several nebulae
d)
Nebulae contain many galaxies
8.
A characteristic of a nebula is that it -
a)
is at the center of the solar system
b)
is a region where stars are born
c)
forms halfway through a star's life cycle
d)
has the coolest temperature in space
9.
Hot clouds of gaseous elements and compounds that act as nurseries for stars
a)
Galaxies
b)
Star
c)
Nebulae
d)
Black holes
10.
Large objects that form dense gravity wells in space
a)
Galaxies
b)
Star
c)
Nebulae
d)
Black holes
11.
Composed of millions of stars as well as interstellar gas and dust
a)
Galaxies
b)
Star
c)
Nebulae
d)
Black holes
12.
A large ball of gas that generates energy by fusing hydrogen atoms
a)
Galaxies
b)
Star
c)
Nebule
d)
Black holes
13.
Galaxies are classified into all of the following types by their shapes EXCEPT -
a)
spiral
b)
elliptical
c)
lenticular
d)
crescent
14.
The stars and all the other matter in a galaxy are held together by which of the following?
a)
Dark matter
b)
Inertia
c)
Gravity
d)
Magnetism
15.
The Hertzsprung-Russell diagram, for classifying stars based on the relationship between their brightness and their temperature and color, is provided. In comparison to the Sun, Betelgeuse -
a)
is smaller in diameter
b)
is brighter and hotter
c)
is less bright but hotter
d)
is cooler and brighter
16.
The illustration provided shows four locations in or near the Milky Way Galaxy. Which of the labeled locations shows the approximate position of the Sun?
a)
W
b)
X
c)
Y
d)
Z
17.
The table displays the diameters of various stars. The diameter of the Sun would place it, in relative size, between-
a)
LGM-1 and Gliese 229 B.
b)
Gliese 229 B and Proxima Centauri.
c)
Proxima Centauri and Arcturus.
d)
Arcturus and Betelgeuse.
18.
All of the stars that can be observed in the night sky, when compared to the Sun are
a)
thousands of times farther away
b)
hundreds of times larger
c)
millions of times more massive
d)
billions of times hotter
19.
How many of the stars visible in the night sky are closer to Earth than to the Sun?
a)
All of them
b)
None of them
c)
About half
d)
Only one
20.
Astronomers can heat elements here on Earth and observe the wavelengths of light, which the elements emit. By then analyzing the light from distant stars, the astronomers can determine what property of these stars?
a)
Average diameter
b)
Distance from Earth
c)
Overall shape
d)
Chemical composition
21.
The spectrum for visible wavelengths emitted by Star X is compared here to the emission spectra of four different elements. According to the spectral analysis data, which element is present in Star X?
a)
Carbon
b)
Helium
c)
Magnesium
d)
Neon
22.
Light years are used by astronomers to measure what property of celestial bodies?
a)
Distance from Earth
b)
Time since formation
c)
Internal temperature
d)
Absolute brightness
23.
Proxima Centauri is the closest star to Earth after the Sun and is located 4.3 light years away from Earth. How long does it take light from Proxima Centauri to reach Earth?
a)
1 year
b)
4.3 years
c)
43 years
d)
10 trillion years
24.
A scale diagram of four galaxies is provided. Which galaxy has a diameter closest to 75,000 light years?
a)
Galaxy JK23
b)
Galaxy TO37
c)
Galaxy RB17
d)
Galaxy WD28
25.
To express the distance between the Milky Way galaxy and the Andromeda galaxy, the most appropriate unit of measure is the -
a)
meter
b)
kilometer
c)
light year
d)
astronomical unit
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