Which observation is evidence for the Big Bang theory?
Answer and explanation
Correct answer: B. The cosmic microwave background radiation
- Step 1: The Big Bang predicts radiation left over from a hot early universe.
- Step 2: The cosmic microwave background, along with galactic redshift, supports it.
Answer
The cosmic microwave background radiation.
Why not the others: The existence of the Sun: this is not evidence for the beginning of the universe. The rotation of the Earth: this is not evidence for the Big Bang. The phases of the Moon: these are due to orbital positions.
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