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14 terms

Glossary- Infinite Journey

STUDY
PLAY
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.