Big Bang Theory Flashcards
What is the BBT?
is a COSMOLOGICAL model explaining how the UNIVERSE began. It suggests that the universe started its expansion about 13.8 billion years ago.
The idea of the BBT is similar to the? explain why!
bread-raisin model
bread- universe
raisins- galaxies
In the bread-raisin model, the galaxies, represented by the raisins, are EXPANDING.
FALSE. they are not.
Distances in relation to other galaxies just
increases because of the expanding universe.
The BBT states that as the universe expands, the density decreases.
TRUE
The big bang theory suggests that the universe started as a?
It is predicted to be in the core of a black hole with very high temperature and density.
SINGULARITY
The singularity constantly expands and cools.
TRUE!
In the BBT, matter dilutes as the universe expands.
TRUE
The rate of expansion is almost equal to the rate of cooling.
TRUE
What is nucleosynthesis?
This is the formation of elements, such as hydrogen and helium
The presence of the elements created during nucleosynthesis will lead to the formation of?
The STARS and GALAXIES!
The presence of the stars will lead to the formation of?
other cosmic bodies such as planets, comets, and asteroids.
Who are the proponents of the BBT? (4)
- Georges Henri Joseph Edouard Lemaitre
- Edward Hubble
- Arno Penzias and 4. Robert Wilson
What did Lemaitre contribute to the big bang?
HE IS THE FIRST PROPONENT
-suggested the idea of the expanding universe
Lemaitre explained that the universe originated in an
explosive act of ______ atom or the ‘Cosmic egg’
which was like a huge atomic nucleus.
PRIMEVAL
“Cosmic rays would be glimpses of the primeval fireworks of the formation of a star from an atom, coming to us after their long
journey through free space.”
Which proponent said this?
LEMAITRE
What did Hubble contribute to the big bang?
-the hubble’s law!
-provided an evidence that the universe was not static but
expanding.
What does Hubble’s law state?
The relationship of the velocities of distant objects
in the universe is directly proportional to their distance from Earth.
____ noted that there was more to the universe
beyond the Milky Way.
EDWARD HUBBLE
Hubble noticed that all the galaxies seemed to be
moving away from Earth with velocities that
increased in proportion to their distance.
TRUE
What is the difference between the red shift and the blue shift, according to Hubble’s discovery?
Red- AWAY MALAYO
Blue- MALAPIT
What did Penzias and Wilson contribute to the BBT?
- discovered that microwaves with wavelengths of about 7cm were present in space.
What are the microwaves discovered by Penzias and Wilson called?
COSMIC BACKGROUND RADIATION
What is the significance of the CMB?
the wavelengths are the REMNANTS of the “explosion” when the universe was formed.
CMB radiation is believed to be the thermal energy released when the ionized gases became neutral particles as the early universe cooled down.
TRUE
What are the drawbacks of the BBT?
It failed to explain how the universe was CREATED.
