Big Bang Theory

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Across
  1. 2. The universe is mostly made up of _____ and Helium.
  2. 4. ____ began suddenly with a great expansion 13.7 billion years ago.
  3. 5. Belgian cosmologist and Catholic priest
  4. 9. The first _____ formed at 300,000 years.
  5. 11. The dark black lines, called _______, represent the chemical elements in a star which are used for identification, like a fingerprint.
  6. 12. First person to use the term "Big Bang"
Down
  1. 1. The universe must have began as one singular particle, the _____.
  2. 3. The first _____ formed at 1 billion years.
  3. 6. The big bang theory states that the Universe is _____.
  4. 7. leftover radiation from the Big Bang.
  5. 8. ______ General Theory of Relativity led scientists to think the universe was static (lacking movement).
  6. 10. Edwin Hubble discovered the property known as _____.