When the outward force due to fusion balances the inward force of gravity...
equilibrium
stasis
parallax
nova
Shadows change length during the day because....
of the earth's position in front of the sun.
because the moon gets in front of the sun.
the sun is moving
because people move.
Which of the following choices lists the colors of stars from hottest to coolest...
orange, red, white, blue, yellow
blue, white, yellow, orange, red
yellow, orange, red, blue, white
red, yellow, orange, white, blue
A shadow is shortest
in May.
at noon because the sun is directly overhead.
when there is a full moon.
at dinner time because the sun is setting.
Which layer of the sun has the densest material?
the core
the convection zone
the radiative zone
the corona
What accounts for different stars being seen in the sky during different seasons of the year?
Earth's rotation on its axis
stellar motion around Polaris
Earth's revolution around the sun
position north or south of the equator
Stars appear to move in circular paths through the sky because...
the Milky Way is a spiral galaxy
Earth rotates on its axis
Earth orbits the sun
the stars orbit Polaris
At night we can see over _____________ stars.
2,000, 000
2,000
20
2
Sunspots are regions of...
intense magnetism
lighter color
high temperature
the core
Constellations appear to move across the sky because....
the earth is moving.
the sun is moving.
all of these.
the constellations are moving.
A star is a ....
is a planet.
giant ball of hot gas.
always has 5 points.
has a yellow color.
Our solar system is...
our sun and planets.
in the Milky Way galaxy.
includes our moons and the moons of our other planets.
all of these
A constellation .....
is seen every night all year long.
is a group of stars that form a pattern.
is a group of planets.
revolves around the un.
How do stellar spectra provide evidence that stars are actually moving?
long exposure photos show curved trails
light separates into different wavelengths
Doppler shifts occur in the star's spectrum
dark line spectra reveal a star's composition
Which constellation do we see in the winter months?
Orion
The Lobster
Jupiter
Milky Way
Which is the closest star to earth?
Pluto
the sun
Polaris
Orion
A nebula begins the process of becoming a protostar when the nebula...
changes color from red to blue
develops a red shift
explodes as a nova
begins to shrink, increase its spin and temperature
What happens to main sequence stars (the sun) when energy from fusion is no longer available?
they switch to fission reactions
they expand and become supergiants
they contract and turn into neutron stars
they collapse and become white dwarfs
A shooting star is...
a star shooting across the sky
a meteor entering earth's atmosphere
a sun blowing up
a fairy tale
Northern lights and southern lights are other names for
prominences
eclipses
auroras
granulations
The observed change in the frequency of a wave when either the source or observer is moving...
apparent magnitude
Doppler effect
absorption spectra
parallax
We do not see other stars during the day because...
our star the sun is too bright.
they are too far away.
they set in the east.
they set in the west.
The number of hydrogen atoms that fuse to form a helium atom is...
four
six
two
eight