The Milky Way Galaxy we live in, is what type of galaxy?

The collection of all known energy in the universe, arranged in order of increasing frequency, is called the ____.

The ratio of an object's mass to its volume is called _____.

The Big Bang Theory states that the universe ________.

The color represented by ROYGBIV makes up the _______.

The distance it takes for light to travel in one year is called ______.

What is the relationship between wavelength and frequency of electromagnetic radiation?

Scientist believe that _____ radiation is leftover from the Big Bang.

The spectral shift of galaxies toward longer , or more red wavelengths of light is called _____.

The compressing of sound or light waves as they approach an object and stretching out of those same waves as they move away from an object is know as _______.

The phenomenon, that as a light source moves away from an object, it will cover more area of that object and appear less bright can be explained by ______.

Which are the rocky planets?

How many wave peaks pass a certain point per given time ________.

Found in all parts of the universe- first elements that were formed and helps to explain the Big Bang.

Planets, and all the other objects that revolve around the sun.

Which type of spectra is an emission spectrum that consists of a full continuum of wavelengths ?

Each element produces a unique set of ___________lines.

What is the subatomic particle in an atom that gives of light energy to produce the spectral lines?

What type of spectra lines do you observe from a gas tube containing an element such a hydrogen?