Big Bang Theory
According to the Big Bang Theory, the universe began in what type of state?
What is a hot and dense state
This scientific instrument separates light into its different wavelengths.
What is a spectroscope
These unique patterns act like fingerprints that allow scientists to identify elements.
What are spectral lines
These are the two major star characteristics compared on an H-R diagram.
What is temperature and luminosity
This process is responsible for producing energy in the Sun's core.
What is nuclear fusion
These are the two most abundant elements found in the universe.
What are hydrogen and helium
Of red, green, and violet visible light, this color has the longest wavelength.
What is red
By comparing a star's spectral lines with known elements, astronomers can determine this property of the star.
What is the elements it is made out of
Most stars, including our Sun, are found in this region of the H-R diagram.
What is main sequence
During fusion in the Sun, hydrogen eventually combines to form this element.
What is helium
This leftover radiation from the early universe can still be detected throughout space today.
What is Cosmic Microwave Background Radiation (CMBR)
As wavelength becomes shorter, these two properties of a wave increase.
What is frequency and energy
A galaxy whose spectral lines have shifted toward this color is moving away from us.
What is red
The hottest stars are located on this side of an H-R diagram.
What is the left (blue) side
This layer of the Sun is where energy from the core is pushed to the surface.
What is the convection zone
This is the percentage of each element predicted by the Big Bang Theory.
This type of electromagnetic radiation has the longest wavelength and lowest frequency.
What are radiowaves
A shift of spectral lines toward this color tells astronomers that an object is moving toward us.
What is blue
A star that is cool but extremely luminous would likely be found in one of these two regions of the H-R diagram.
What are giants and supergiants
Beginning at the center of the Sun, these three layers occur in this order.
The observation that most distant galaxies are moving away from us provides evidence that the universe is doing this.
This type of electromagnetic radiation has the shortest wavelength and highest energy.
What are gamma rays
According to Hubble's Law, objects that are farther away from us appear to be moving?
What is faster
These stars can have extremely high temperatures but relatively low luminosities because of their very small size.
What are white dwarfs
This type of star is the most dense.
What are neutron stars