lesson 1.2 Flashcards
(22 cards)
As opposed to the big bang theory, Steady-State Theory states that the universe _____.
has no
beginning and no end.
The steady-state theory suggests that the universe _____-.
has always been here and will
always be present.
t also suggests that _______ but it
continuously expands while simultaneously creating matter.
the universe always looks the same in any time or space
During expansion, the density of the universe remains _____; hence, the name
steady state.
constant
It also explains that the rate of the death of stars is _____ to the rate of birth of
stars.
equal
Both the big bang and steady-state theories explain that the universe is
______.
expanding
Proponent of Steady State
- Hermann Bondi, Thomas Gold, and Fred Hoyle
The steady-state idea of ____ may have started when they watched a
movie together in the late ___.
Bondi and Gold 1940s
It was a horror movie entitled ___which started and ended in the
same way.
“Dead of Night”
The _____ of the movie inspired them to suggest that the universe was dynamic but unchanging.
circular plot
Drawbacks of Steady State
- Not parallel with the law of conservation of energy and mass
- The discovery of the cosmic microwave background radiation
The steady-state theory explained that cosmic radiation is a result of a ______.
supernova
The oscillating universe theory discusses that the universe is
expanding and will
contract once all the energy after the big bang has been used up, only to expand
again once it approaches the point of singularity (i.e., the beginning of a new
universe).
● It is also referred to as the pulsating theory.
The Oscillating Universe Theory
The oscillating universe theory can be described as the combination of the ____
big bang and the big crunch.
● The ___ occurs when the universe expand, reverses, collapse, causing the formation of a singularity or the occurrence of another big
bang.
big crunch
_______ suggests that once the universe reverses and attains
the point of singularity, another universe will be born.
The oscillating universe theory
once the universe reverses and attains
the point of singularity, another universe will be born.
big bounce.
theorized that the universe may be the first in the cycle, or it could be a
result of a previous big bounce event.
Richard Tolman
Proponent of Oscillating Universe Theory
- Richard Tolman
● entropy
- Richard Tolman
Drawback of Oscillating Universe Theory
This theory suggests that the universe would collapse on its own after it reaches
its full expansion, which would violate some current laws of physics.
