Universe Text Crossword (Weeks 1–2)

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Across
  1. 2. = A space with no air.
  2. 4. = What stars give off as heat and light.
  3. 5. = A gas that stars are mostly made of.
  4. 8. = The centre of a star.
  5. 9. = A gas made when hydrogen joins together in a star.
  6. 10. = A huge ball of hot gas that gives off light.
  7. 11. = Movement that makes sound.
  8. 13. = What sound travels through (like air).
  9. 14. = Particles that come from the Sun.
Down
  1. 1. = How hot something is.
  2. 3. = A force that pushes things together.
  3. 6. = When atoms join together to make energy in a star.
  4. 7. = Tiny pieces of matter.
  5. 12. = Tiny building blocks of matter.