Crossword Puzzle

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Across
  1. 4. What happened to the temperature of the universe after 300 thousand years.
  2. 6. Which were the first present elements in theuniverse?
  3. 7. will get bigger In the future, what would you expect to happen to distant galaxies?
  4. 8. When were the first recognizable elements throughout to be created?
Down
  1. 1. What subatomic particle is the first to show up in the universe?
  2. 2. As scientists study the far reaches of the universe, which elements do you think are still abundant today?
  3. 3. Why do you think hydrogen, helium, and lithium were the first elements to show up?
  4. 5. What force is responsible for the certain creation of galaxies and stars?