Mountains

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Across
  1. 5. The rate at which the temperature falls relative to height.
  2. 11. Molten rock inside the mantle.
  3. 12. The rate at which temperature increases with depth.
  4. 14. Section of mountains where strong winds dry out growing tips of trees.
  5. 15. Toe found on the upper parts of an animal's leg.
Down
  1. 1. Rock formed withing bodies of water.
  2. 2. Section of mountains where trees are decorated with moss and ferns.
  3. 3. Molten rock solidified outside the mantle.
  4. 4. Section of mountains composed of fir or pine trees.
  5. 6. Outermost skin of the Earth, made of soil and rocks.
  6. 7. Section of mountains containing only grasses and wildflowers.
  7. 8. Section of mountains where there are no more trees.
  8. 9. The mating season of animals like rams.
  9. 10. Feet for animals that spread for more traction.
  10. 13. Layer of hot, semi-molten rocks below the Earth's surface.