GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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expanded
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had a beginning 13.8 billion years ago
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used to be much smaller and hotter
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All of the above
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Detailed explanation-1: -This theory states that about 13.7 billion years ago, all the matter in the Universe was concentrated into a single incredibly tiny point. This tiny point began to enlarge rapidly in a hot explosion, and it is still expanding today. All the galaxies are moving away from us is the evidence for the Big Bang theory.
Detailed explanation-2: -The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began.
Detailed explanation-3: -The Doppler red-shift of light observed from distant stars and galaxies gives evidence that the universe is expanding (moving away from a central point). This allows for Big Bang Theory, because after a “bang” occurs all of the matter moves away from the point of origin.
Detailed explanation-4: -According to this theory the Universe expanded from an extremely small, extremely hot, and extremely dense state. Since then it has expanded and become less dense and cooler. The Big Bang is the best model used by astronomers to explain the creation of matter, space and time 13.7 billion years ago.