Light, Emission Spectrum, & Big Bang Theory Crossword Puzzle

QUESTIONS LIST:

• hydrogen : this is the most abundant element in the universe.
• hubble : this law tells us galaxies that are farther away move faster.
• radiation : cosmic microwave background is leftover _ from the big bang.
• microwaves : _ are the types of waves that the universe is now filled with.
• fingerprint : each element has it's own set of spectral lines. they are like a star's _ .
• evidences : these are the three main _ for big bang theory: red shift, an abundance of hydrogen and helium, cosmic background radiation
• direction : red and blue shifts in wavelengths are used to tell us the _ an object is moving.
• blue shift : this type of light shift occurs when 2 objects move towards each other.
• less : the longer the wavelength, the _ energy a wave has.
• redshift : this type of light shift is evidence that the universe is expanding.
• spectrum : studying a star's _ , we know what it is composed of and what direction it's moving.
• helium : this is the second most abundant element in the universe.
• more : the higher the frequency, the _ energy a wave has.
• expansion : there wasn't an explosion; it was actually an _ .
• universe : the big bang theory is the leading explanation of how the _ began.