Physical Science Final part 6
According to calculations made by modern astronomers, the age of the universe is close to
14 billion years
The core of the Moon is
solid
The Big Bang is regarded as the expansion of
space
Asteroids orbit the
sun
Comets orbit about the
sun
The predominant gas in the atmosphere of Venus is
carbon dioxide.
Red giant stars are
close to exhausted their supply of oxygen
A supercluster is a
cluster of galactic clusters
The temperature of a star is evidenced by its
color
Cosmic background radiation refers to
faint microwave radiation emanating from all directions that is the remnant heat of the Big Bang
Edwin Hubble discovered that the farther away a galaxy is the
faster it is receding from us.
A spinning cloud of interstellar gas tends to
flatten
This part of the Milky Way is a spherical cloud of thinly scattered stars and globular clusters
halo
The moon's maria are
heavily created lava flows
A Starburst galaxy has this name because of its
high rate of star formation
A star's luminosity tells us
how much energy a star produces
The North Star has very little apparent rotation in the night sky because
it lies directly above the earths rotational axis
A white dwarf is a former
low mass star
The H-R Diagram, an important tool of astronomers, relates stellar temperature to stellar
lumonisity
The Big Bang
marked the beginning of space and time
Spacetime is curved by
mass
The determining factor in the stages a star will progress through from birth to death is its
mass
A small rock in interplanetary space is called a
meteoroid
When the alignment of the Sun, the Moon, and Earth produce a solar eclipse, the body between the other two is the
moon
One of Edwin Hubble's discoveries is that the known universe is expanding. This means that
most all observable galaxies are moving way from each other
The "Big Bang" refers to the
oint in time in which the known (and perhaps knowable) universe came into being.
On the H-R diagram our Sun is a
on the main sequence
heat death refers to the universe
reaching the lowest energy state possible, which will mean the greatest level of entropy.
After our Sun burns its supply of hydrogen, it will become a
red giant
Compared with the Population II stars in globular clusters, the Population I stars in the galactic disk are
richer in the heavier elements
A greater gravitational field causes time to
slow down
Supernovae are one of the most extreme events in the known universe. They are caused by
the collapse of a super-massive giant star
"Cosmological Redshift" refers to
the expansion of space itself
A cloud of interstellar gas is held together by
the gravitational force
How is a larger star like an SUV, while a smaller star like a fuel efficient hybrid vehicle?
the larger the star the faster it burns fuel
Cosmic Inflation refers to
the moment of the sudden brief burst in size of the universe after the big bang
eternal inflation refers to
the possibility that our universe is only a patch of a greater universe and that the process of universe spawning will continue forever.
Nebular theory pertains to the formation of
the solar system
The star nearest the Earth is
the sun
Cosmology is the study of the overall structure and evolution of
the universe
The planet that is most tipped to its orbital plane is
uranus
The difference between lightwaves approaching and lightwaves receding is
when approaching, light waves have higher frequency; when receding their frequency is lower.
dark energy
would be the opposite of gravity, is the phenonmon responsible for the acceleration of the universe, is energy that exerts and outward pressure, causing space time to expand
What is the likely cause of the 98° tilt of Uranus's axis?
A collision with a large body early in the solar system's evolution
The reason we don't have solar and lunar eclipses monthly is because of the
Moon's orbit is inclined about five degrees with respect to the Earth's orbit around the Sun
the big rip refers to
accelerating influence of dark energy, causing all matter to become completely ripped apart.
The "redshift" of a galaxy refers to the rate
at which is receding
Evidence of the solar wind on Earth is the
aurora borealis
The general direction of a comet's tail is
away from the sun
Between which planets is the asteroid belt found?
between mars and jupiter
