Lesson 1 - The Big Bang Theory Crossword Puzzle

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Across
  1. 3. Cluster of stars, dust, gas & matter (2)
  2. 4. Universe includes ALL _____ & space that exists(1)
  3. 6. Our planetary system
  4. 8. Our galaxy
  5. 12. 13.8 million years old (1)
Down
  1. 1. Theory that states the universe was created from an explosion or rapid expansion (8)
  2. 2. Hypothetical substance that makes up most of the universe (21)
  3. 5. universe is mostly made of hydrogen and _____ (12)
  4. 7. Distant galaxies are moving _____ from Earth (16)
  5. 9. Distance light travels in one year (6)
  6. 10. Cosmic background ______________ (17)
  7. 11. Stars are constantly burning ______ (19)