Physic 10

12345678910111213141516171819
Across
  1. 2. a heavy electron.
  2. 3. a big things that went around a sun and moons were anything that went around.
  3. 6. a generic name for electrons and their relatives.
  4. 7. hole a star that crush with great gravity.
  5. 9. it was invented to Save the conservation of energy.
  6. 10. something can can never be prove___________?
  7. 11. science consist of Scientific theory and ____________?
  8. 15. a no longer consider planet.
  9. 16. closest planet to the sun.
  10. 17. dark matter, star, and what make up a galaxies.
  11. 19. Cloud comets froze a huge spherical cloud far outside of the Kuiper belt.
Down
  1. 1. system consist of things that go around a Star.
  2. 3. neutron and ______ are help together by mesons?
  3. 4. Quarks are held together by what?
  4. 5. a group of millions to billions of stars help together by mutual gravity.
  5. 8. result from a runaway thermonuclear reaction.
  6. 12. what is the opposite charge of a proton?
  7. 13. rocks going around space.
  8. 14. something lots smaller than atom.
  9. 18. big enough to get hot.