The Big Bang

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Across
  1. 3. Scientists use its small temperature fluctuations to study the early universe, its composition, and the origins of galaxies
  2. 5. opposite of heat up
  3. 7. scientific explanation for the origin and evolution of the universe
  4. 8. an atomic number of 1
  5. 10. chemical element of atomic number 2
Down
  1. 1. to increase in extent, size, volume, scope, etc
  2. 2. he number of times an event repeats in a set amount of time
  3. 4. the change in frequency or wavelength of a wave
  4. 6. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
  5. 9. the change in frequency or wavelength of a wave