Glossary- Infinite Journey
Order by
14 terms
Terms | Definitions |
|---|---|
 cosmology | the study of the beginning and the end of the universe |
| singularity | a single point of immense energy present at the time of the big bang |
| positrons | positively charged electrons |
| Big Bang Theory | theory which states that the universe began about 15 billion years ago with the explosive expansion of a singularity |
| steady state theory | theory which states that there was no beginning to the universe and that the universe does not change in appearance |
| Nuclear reactions | reactions involving the breaking of bonds between particles protons and neutrons inside the nuclei of atoms. a |
| absolute zero | temp at which the particles that mark up and object or substance have no kinetic energy approx -273.15C |
| big crunch theory | a theory which proposes that the universe will snap back on itself resulting in another singularity |
| big chill theory | a theory which proposes that the universe will continue indefinitely until the stars use up their fuel and burn out |
| big rip theory | universe with rip apart due to accelerating expansion. |
| Doppler Effect | observed change in frequency of a wave when the wave source and observer are moving in relation to each other |
| spectrum | light from a source separated out into the sequence of colours, showing the different frequencies |
| Red shift | shift of lines of a spectral pattern towards the red end when the source is moving away from the observer |
| Blue shift | shift of lines in a spectral pattern towards the blue end when a light source is moving rapidly towards the observer. |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.