Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Theories of the Origin of the Universe and EM Spectrum

Big Bang Theory a theory that days that the universe began as a small point that expanded rapidly about 13.7 billion years ago
Red Shift occurs when a light source moves AWAY from an observer
Blue Shift occurs when a light source moves TOWARDS an observer
Oscillating Theory the theory that states the universe will continue to expand and contract in a cycle, forever
Big Crunch Theory the theory that states the expansion of space will eventually reverse and will recollapse, ultimately causing the cosmic scale factor to reach zero or cause a reformation of the universe with another "bang"
Evidence that Supports the Big Bang Theory red shift and the Cosmic Microwave Background radiation
Electromagnetic Spectrum a grouping of all possible energy levels of electromagnetic radiation from radio waves to gamma rays
Cosmic Microwave Background (CMB) electromagnetic radiation left over from early development of the universe that fills the universe; detected with a radio telescope and is evidence of the Big Bang theory
Wavelength the distance between any two corresponding points on successive oscillations of a wave, such as from peak to peak
Frequency the amount of waves that pass a given point over a period of time
Created by: Mrs_Bullock