Lesson 1 - The Big Bang Theory Crossword Puzzle

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Across
  1. 4. 13.8 million years old (1)
  2. 7. Universe includes ALL _____ & space that exists(1)
  3. 9. Theory that states the universe was created from an explosion or rapid expansion (8)
  4. 10. Our galaxy
Down
  1. 1. Our planetary system
  2. 2. the universe there is a very low energy radiating in every direction. This is called cosmic background ______________ (17)
  3. 3. Distance light travels in one year (6)
  4. 5. galaxies are moving _____ from Earth (16)
  5. 6. Cluster of stars, dust, gas & matter (2)
  6. 8. universe is mostly made of hydrogen and _____ (12)