10.5.2 Fill in: expanding, exploded, collapse.
prior, infinite.
Astronomers have discovered that our universe
has been since it was formed.
2 Many universes may have existed
to the one we are living in.
3 Our universe might actually be just one of a(n)
number of other universes.
4. One day our universe may ..
and give rise to a new universe.
5 According to the Big Bang Theory, our universe
into existence from a single point.
​

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