Chapter 1 and 3 crossword

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Across
  1. 1. Lies between the innermost layer, the core, and the thin outermost layer, the crust
  2. 4. The regions of the surface, atmosphere, and hydrosphere of the earth
  3. 5. The saltiness or dissolved salt content of a body of water
  4. 7. The layer of the earth's atmosphere above the troposphere
  5. 11. Water that collects as droplets on a cold surface when humid air is in contact with it
  6. 14. When water disappears into the sky
  7. 15. This makes cities and towns dirty and smelly
  8. 16. The almost spherical concentric regions of matter that make up the earth and its atmosphere
  9. 17. The bottom of a pie
  10. 18. The process by which sound waves travel through a medium
  11. 19. The gradual destruction or diminution of something
Down
  1. 2. Has to do with farming and animals
  2. 3. The variety of life in the world or in a particular habitat or ecosystem
  3. 6. The center of the earth
  4. 7. The endurance of systems and processes
  5. 8. The emission of energy as electromagnetic waves or as moving subatomic particles
  6. 9. Formed from oxygen by electrical discharges or ultraviolet light
  7. 10. The envelope of gases surrounding the earth or another planet
  8. 12. The branch of biology that deals with the relations of organisms to one another and to their physical surroundings
  9. 13. The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise