The Big Bang theory is a theory about the origin of the Universe.
Evidence for the Big Bang theory is provided by red-shift and CMB radiation.
State what the abbreviation CMB is short for.
Which of the following statements about the Big Bang theory are correct?
Tick (✓) three boxes.
The Universe began 14 million years ago | |
There was a giant explosion known as the Big Bang | |
The Universe expanded from a single point | |
It heated as it expanded to form the Universe today | |
Each point in the Universe expands away from the others | |
So, the further away galaxies are the slower they are moving |
The table below shows statements of evidence for the theory.
Place a tick (✔) in each row to indicate whether the statement is evidence from galactic redshift or CMB radiation.
Statement | Evidence from Galactic Redshift | Evidence from CMB Radiation |
Astronomers discovered radiation in the microwave region of the electromagnetic spectrum coming from all directions | ||
Radiation is in the microwave region because the radiation initially from the big bang has redshifted as the Universe has expanded | ||
Observations of light spectrums from supernovae indicate that distant galaxies are receding | ||
Galaxies that are further away are moving faster, as their distance is proportional to their speed | ||
Light spectrums from distant galaxies show that light is redshifted which is evidence of the universe expanding |
The Steady State theory is also a theory about the origin of the Universe.
State one similarity and one difference between the Big Bang theory with the Steady State theory.
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