10+BIG-BANG+Vs+STEADY-STATE

=__**Big Bang vs Steady State**__ =

3.14 Demonstrate an understanding of the Steady State and Big Bang theories. 3.15 Describe evidence supporting the Big Bang Theory, limited to red-shift and the cosmic microwaves background (CMB) radiation. 3.16 Recognise that as there is more evidence supporting the Big Bang Theory than the Steady State Theory, it is currently the accepted model for the origin of the Universe. 

RED SHIFT []

__Steady State__ In steady state views, new matter is continuously created as the universe expands, so that the perfect cosmological principle is adhered to. in other words matter is being multiplied and the density of the universe stays the same as the universe expands.

**__Big Bang__** In the Big Bang views, the universe is constantly expanding. Scientists prefer this theory over the steady state theory. It was called "big bang" because this theory is said to have started with an explosion in space creating everything, even time.

 **Evidence for this theory:** 
 * First of all, we are reasonably certain that the universe had a beginning.
 * Second, galaxies appear to be moving away from us at speeds proportional to their distance. This is called "Hubble's Law," named after Edwin Hubble (1889-1953) who discovered this phenomenon in 1929. This observation supports the expansion of the universe and suggests that the universe was once compacted.
 * <span style="font-family: 'Comic Sans MS',cursive; font-size: 130%;">Third, if the universe was initially very, very hot as the Big Bang suggests, we should be able to find some remnant of this heat. In 1965, Radioastronomers Arno Penzias and Robert Wilson discovered a 2.725 degree Kelvin (-454.765 degree Fahrenheit, -270.425 degree Celsius) Cosmic Microwave Background radiation (CMB) which pervades the observable universe. This is thought to be the remnant which scientists were looking for. Penzias and Wilson shared in the 1978 Nobel Prize for Physics for their discovery.
 * <span style="font-family: 'Comic Sans MS',cursive; font-size: 130%;">Finally, the abundance of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins.

<span style="font-family: 'Comic Sans MS',cursive; font-size: 130%;">Evidence for the big bang theory is a) greater (more) and b) the evidence completes a bigger picture. This is why scientists are teaching the Big Bang theory to the nation instead of Steady State theory.