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The Big Bang theory for SQA National 5 Physics
This page covers the following topics:
1. The Big Bang model
The Big Bang model states that billions of years ago, the whole Universe was a tiny, dense region of extremely high temperatures. The theory states that the whole Universe as we know it today expanded from that small region. The red-shifted light received from distant galaxies provides evidence for this model, as it suggests that the Universe is currently expanding. Cosmic Microwave background radiation (CMBR) has been detected coming from all directions in space and has a very low temperature. CMBR is said to be the remains of the energy procuded in the Big Bang and is spread thinly across the Universe, thus providing more evidence for this model.
1
How does redshift provide evidence for the Big Bang model?
The red-shifted light received from distant galaxies provides evidence for this model, as it suggests that the Universe is currently expanding.
2
Describe the Big Bang model.
The Big Bang model states that billions of years ago, the whole Universe was a tiny, dense region of extremely high temperatures. The theory states that the whole Universe as we know it today expanded from that small region.
3
What does the Big Bang model state about how the Universe started?
The Big Bang model states that billions of years ago, the whole Universe was a tiny, dense region of extremely high temperatures.
4
State one piece of evidence for the Big Bang model.
Red-shifted light from distant galaxies/CMBR
5
State what is meant by CMBR.
Cosmic Microwave background radiation.
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