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Across
  1. 3. VAPOR Water in its gaseous state.
  2. 5. A naturally occurring solid aggregate of minerals.
  3. 8. The atmospheric layer where most meteors burn up.
  4. 9. Coarse-grained soil particles.
  5. 11. A layer in the upper atmosphere where gases are ionized by solar radiation.
  6. 15. LAYER A region in the stratosphere that absorbs UV radiation.
  7. 16. The most abundant gas in Earth's atmosphere.
  8. 18. The layer between the Earth's crust and core.
  9. 20. Molten rock that erupts onto the Earth's surface.
  10. 22. The Earth's outermost solid shell.
  11. 23. The lowest layer of the atmosphere, where weather occurs.
  12. 24. A naturally occurring, inorganic solid with a definite chemical composition and crystal structure.
  13. 25. A gas essential for the respiration of most organisms.
  14. 27. Decomposed organic matter in soil.
  15. 28. The outermost layer of Earth's atmosphere.
Down
  1. 1. The atmospheric layer with the highest temperatures.
  2. 2. An underground layer of rock or sediment that holds groundwater.
  3. 4. The layer of gases surrounding Earth.
  4. 6. Fine-grained soil particles.
  5. 7. Short-term variations in atmospheric conditions.
  6. 10. The universe, encompassing all matter and energy.
  7. 12. All the water on or near the surface of the earth.
  8. 13. The Earth's central, metallic region.
  9. 14. Material deposited by water, wind, or ice.
  10. 17. The atmospheric layer containing the ozone layer.
  11. 19. Molten rock beneath the Earth's surface.
  12. 21. A cloud of gas and dust in space.
  13. 22. A visible mass of water or ice particles in the atmosphere.
  14. 26. The frozen water part of the Earth system.
  15. 29. A large section of the Earth's crust.