Transcript Stars and Galaxies Review Game

Stars and Galaxies
Review Game
Why do stars all have
different characteristics?
They are different
stages in their life
cycles.
How did our planets
form in our solar
system?
From Supernovas –
gravity pulled pieces
together
Name the 2 factors
used to classify
galaxies:
Shape and Size
What clues show us that
the solar system formed
billions of years after the
beginning of the
Universe?
Radioactive dating from
galactic Doppler
What determines
luminosity of a star?
Mass and
temperature
Name the common
galaxy shapes:
Spiral, elliptical, and
irregular
Most of the galaxies
are ______________.
Dwarf galaxies
(smaller than ours)
How does the size of
most other stars
compare to the size of
our sun?
They are much larger
Where is
our solar
system
located in
the Milky
Way?
Which 2 elements are
most abundant in
stars?
Hydrogen and helium
What are the stages (in order) in a star’s life
cycle?
The Sun’s source of
energy is:
Nuclear fusion
What force is
prevalent throughout
the universe?
Gravity
What is the reason
fusion reactors are
difficult to develop?
It requires huge
amounts of energy
Why are some
objects in space not
pulled into spherical
shapes?
They are too small
What is happening to
the size of the
universe?
Galaxies are moving
away from each other.
What do main
sequence stars have
in common?
Their temperature.
What indicates that
the universe is
expanding?
Redshifts of distant
galaxies.
Why have astronauts
never visited other
galaxies or solar
systems?
They are too far away
Why is it icy on the
outer edge of solar
systems?
Cold temperatures due
to great distances from
the central star.