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Stars

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The yearly orbit of Earth around the Sun is called its ____.
a.
rotation
c.
revolution
b.
ellipse
d.
tilt
 

 2. 

The positions of the constellations appear to change throughout the year because ____.
a.
Earth revolves around the Moon
b.
Earth revolves around the Sun
c.
the constellations revolve around Earth
d.
the Sun revolves around Earth
 

 3. 

The distances to nearby stars can be measured by using ____.
a.
miles
c.
Astronomical units
b.
light years
d.
parallax
 

 4. 

The Sun produces energy by fusing hydrogen atoms into ____ atoms in its core.
a.
carbon
c.
iron
b.
helium
d.
oxygen
 

 5. 

The intense magnetic fields of sunspots cause archlike eruptions called ____.
a.
solar eclipses
c.
photospheres
b.
corona
d.
prominences
 

 6. 

A galaxy that has a shape similar to a football is a(n) ____ galaxy.
a.
normal spiral
c.
elliptical
b.
barred spiral
d.
irregular
 

 7. 

All of the following are true of the Milky Way EXCEPT that it ____.
a.
is a spiral galaxy
c.
is a member of the Local Group
b.
has less than 1 million stars
d.
is 100,000 light-years across
 

 8. 

The Big Bang theory of the formation and expansion of the universe is supported by the observed ____.
a.
blue-violet shift
c.
"big crunch"
b.
red shift
d.
shorter light wavelengths
 

 9. 

A ____ is a region so dense that nothing, including light, can escape its gravity field.
a.
supernova
c.
black hole
b.
white dwarf
d.
supergiant
 

 10. 

Dark, cooler areas on the Sun's surface are called ____.
a.
sunspots
c.
coronas
b.
solar flares
d.
prominences
 

 11. 

____ are patterns of stars in the sky.
a.
Galaxies
c.
Star clusters
b.
Constellations
d.
Binaries
 

 12. 

As Earth travels in its ____, different constellations are visible at different times of the year.
a.
atmosphere
c.
galaxy
b.
orbit
d.
star cluster
 

 13. 

A star begins as a ____, a large cloud of gas and dust.
a.
nebula
c.
dwarf
b.
giant
d.
black hole
 

 14. 

The spiral shape of the Milky Way Galaxy CANNOT be seen from Earth because ____.
a.
we are located above the galaxy
b.
we are located within one of its spiral arms
c.
our view is blocked by the Sun
d.
none of the above
 

 15. 

The ____ states that between 15 and 20 billion years ago, the universe began expanding out of an enormous explosion.
a.
H-R diagram
c.
Big Bang theory
b.
binary star theory
d.
"big crunch" theory
 

 16. 

A red shift in the spectrum of the light from an object indicates the object is moving ____ you.
a.
away from
c.
at a right angle from
b.
toward
d.
none of the above
 



 
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