LILAS PUZZLES

1234567891011121314151617181920
Across
  1. 2. the planet on which we live
  2. 3. A diagram showing the relation of things
  3. 5. the state of the atmosphere
  4. 8. the development of kinds of living organisms
  5. 11. branch of science which has celestial objects
  6. 15. something necessary for breathing
  7. 16. an item constructed by several parts
  8. 17. A big star in the night
  9. 18. Something bright in the sky
  10. 19. hot molten or semi fluid
  11. 20. A subject
Down
  1. 1. a sudden violent shaking of the ground
  2. 3. a typically clear-hard-brittle substance
  3. 4. a tough outer part
  4. 6. a solid naturally occurring organic substance
  5. 7. the condition of being hard
  6. 9. a mountain or hill with a vent for lava
  7. 10. a sheet or quantity of something
  8. 12. Something determined by the sun
  9. 13. a long high sea wave
  10. 14. a tiny functional unit of an organism
  11. 18. A hot ball