Why Stars Matter

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Across
  1. 2. a massive glowing ball of hot gas
  2. 3. the process by which stars create new elements
  3. 7. the element formed when hydrogen atoms fuse together
  4. 9. the force that holds atomic nuclei together during fusion
  5. 11. the process that powers every star
  6. 14. the important role something plays in helping the universe develop
  7. 15. the light and heat produced by stars
  8. 18. the lightest element and the main fuel of stars
  9. 19. a pure substance made of only one kind of atom
Down
  1. 1. plants use sunlight to carry out this process
  2. 4. the stage during which a star spends most of its life producing energy
  3. 5. the explosion of a massive dying star
  4. 6. the element you breathe and that is part of water
  5. 8. the element that forms the basis of all known life
  6. 10. tiny particles that make up all the elements
  7. 12. energy that comes from the sun
  8. 13. the ancient material from exploded stars that eventually became Earth and living things
  9. 16. the center of a star where fusion takes place
  10. 17. the star at the center of our Solar System