Big History pt. 1

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Across
  1. 1. The study of the origin and structure of the universe
  2. 4. When two light atomic nuclei join to make a heavier one
  3. 6. The ability to do work or cause change
  4. 8. A huge system of millions or billions of stars, dust, and gas
  5. 9. A pure substance made of one kind of atom
  6. 10. The scientific theory that marks the origin of the universe
  7. 11. A statement or proposition that is tested with evidence
Down
  1. 1. The quality of having many connected parts or elements
  2. 2. Stuff that has mass and takes up space
  3. 3. All of space, time, matter, and energy taken together
  4. 5. A point of transition where something new emerges
  5. 7. Conditions that are “just right” (neither too much nor too little)