What is the basic idea of the Big Bang theory?
The Universe expanded from a single tiny point of high density and pressure.
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How does red-shift provide evidence for the big bang theory?
Red-shift shows that the universe is expanding, which supports the big-bang theory.
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Are galaxies moving away from each other through space, or is space itself stretching?
Space and the universe itself is expanding and this makes galaxies further apart.
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What is Cosmic Microwave Background Radiation (CMBR)?
Cosmic Microwave Background is the thermal radiation left over from the Big Bang.
It is one of the strongest pieces of evidence for the Big Bang Theory.
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What is the approximate age of the Universe?
~ 14 billion years
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State two pieces of evidence that support the Big Bang theory.
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