WorksheetsCP - Astronomy Test
Total questions: 25
Worksheet time: 13mins
The Big Bang Theory of the formation and expansion of the universe is supported be the observed ____.
blue-violet shift
red shift
"big crunch"
shorter light wavelengths
From the cosmic background radiation, scientists can infer that, just after the big bang, the universe must have been
very small.
hot.
the same average temperature as it is today.
cooler than it is today.
A red shift in the spectrum of light from an object indicates the object is moving ____ you.
away from
toward
at a right angle from
none of the above
What is likely to happen to the universe in the future? It will ___
conract.
remain the same size.
expand forever.
expand and then contract.
Evidence that the universe is expanding is best supported by the observation that the wavelengths of light from distant galaxies are shifted toward the ____.
red end of the spectrum because they are shortened.
red end of the spectrum because they are lengthened.
blue end of the spectrum because they are shortened.
blue end of the spectrum because they are lengthened.
The force that tends to pull together the matter in stars is
gravity.
nuclear fusion.
dark energy.
dark matter.
A star begins as a ____, a large cloud of gas and dust.
nebula
giant
dwarf
black hole
Our Sun is NOT ____.
a part of a binary system
a main sequence star
in a galaxy
a medium hot star
The process by which nuclei having low masses are united to form nuclei with larger masses is ____.
a chain reaction
a chemical reaction
nuclear fission
nuclear fusion
Which of the following elements is most likely to be produced during a nuclear fusion reaction in the Sun?
helium -4
hydrogen-1
uranium-235
uranium-238
A main sequence star becomes a ____ after it uses up the hydrogen in its core.
nebula
supernova
black hole
giant
The Sun produces energy by fusing hydrogen atoms into _____atoms in its core.
carbon
helium
iron
oxygen
Prominences and flares on the Sun are related to sunspots because they are all caused by _____.
electricity
too much heat
Earth's orbit around the Sun
intense magnetic fields
Our Sun is considered average because its temperature and absolute magnitude place it in the ____ range of the H-R diagram.
white dwarf
red giant
main sequence
supergiant
The Hertzsprung-Russell diagram shows that main-sequence stars
are mostly hot and dim.
are mostly cool and bright.
increase in brightness as they increase in temperature.
decrease in brightness as they increase in temperature.
This diagram represents _____ which occurs ______.
nuclear fusion, in stars like our Sun.
nuclear fission, in the center of the earth.
nuclear fusion, to create hydrogen.
nuclear fission, in stars like our Sun.
Using the diagram, what are the products of this reaction?
hydrogen and helium
helium and energy
hydrogen and energy
hydrogen, helium and carbon
A star that is very dim and red in color is _____.
Belelgeuse
VanMaanen's star
Barnard's star
Tau Ceti
According to the HR diagram, what is the approximate absolute magnitude of Rigel?
0
+1
-2
-5
Compared to our Sun, Alpha Centauri A would be
hotter and brighter
cooler and brighter
hotter and dimmer
cooler and dimmer
The North Star (Polaris) is described best as being
a yellow, bright star at 6000 K
a white, dim star at 5800 K
a bright yellow supergiant at 6000 K
a yellow main sequence star at 5800 K
When a star runs out of hydrogen, which two star types can it become?
red giant or supergiant
black hole or protostar
supernova or white dwarf
white dwarf or neutron star
In the diagram, the spectral lines of hydrogen gas from three galaxies, A, B, and C, are compared to the spectral lines of hydrogen gas observed in a laboratory.
What is the best inference that can be made concerning the movement of galaxies A, B, and C?
Galaxy A is moving away from Earth, but galaxies B and C are moving toward Earth.
Galaxy B is moving away from Earth, but galaxies A and C are moving toward Earth.
Galaxies A, B, and C are all moving toward Earth.
Galaxies A, B, and C are all moving away from Earth.
According to the Big Bang Theory, which graph best represents the relationship between time and the size of the universe from the beginning of the universe to the present?
A
B
C
D
The diagram shows a standard spectrum compared to a spectrum produced from a distant star. Which conclusion can be made by comparing the standard spectrum to the spectrum produced from this distant star?
The star's spectral lines have shifted toward the ultraviolet end of the spectrum, and the star is moving toward Earth.
The star's spectral lines have shifted toward the ultraviolet end of the spectrum, and the star is moving away from Earth.
The star's spectral lines have shifted toward the infrared end of the spectrum, and the star is moving toward Earth.
The star's spectral lines have shifted toward the infrared end of the spectrum, and the star is moving away from Earth.
