JohnPaul Ricciardi Vocab Crossword

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Across
  1. 2. a tiny negatively charged subatomic particle found in all atoms
  2. 8. sphere shaped region of space centered on the earth
  3. 14. the measured average distance from earth to the sun
  4. 15. the curved that an object in space takes around another object
  5. 16. a tiny subatomic particle with a positive electrical charge
Down
  1. 1. measures a celestial objects real intrinsic brightness
  2. 3. a reaction where two light atomic nuclei combine to form a single heavier nuclei
  3. 4. the total amount of energy an object emits per unit of time
  4. 5. push or pull on an object that can change its speed direction or shape
  5. 6. the invisible force pulls things toward eachother
  6. 7. 3.26 light years or 30.9 trillion kilometers
  7. 9. total distance that a beam of light travels through empty space in one earth year
  8. 10. step by step process that people use to explore ideas test questions and learn how the natural world works through observation and expiriments
  9. 11. measure of how bright a celestial object looks from earth
  10. 12. the basic building blocks of all matter in the universe
  11. 13. a tiny subatomic particle that has no electric charge and a mass larger than a proton