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Vocabulary Set #4
Question | Answer |
---|---|
Singularity | A point of infinite density that contained all of the matter, space, and time of the universe |
Big Bang Theory | Theory the universe began as a small point that expanded rapidly about 13.7 billion years ago |
Red Shift | Shift toward longer wavelengths of spectral lines emitted by a celestial object. Caused by object moving away from earth, important piece of evidence for Big Bang Theory |
Cosmic Microwave Background (CMB) | Weak radiation that is left over from early, hot stages of expansion of universe |
Hydrogen | Main element formed in the Big Bang |
Doppler Effect | The change in the length of wavelengths when the source of the waves or the observer moves |