Mountains

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Across
  1. 3. What mountain occurs by the Ring of Fire or near Volcanos?
  2. 4. What mountain is caused by erosion?
  3. 5. What mountain is Sierra Nevada?
  4. 6. What mountain is the Alps Mountain?
  5. 7. What mountain is made by magma exploding and then by its ashes?
Down
  1. 1. What mountain is flat at first and then puffs up?
  2. 2. What mountain is the opposite of the Fold Mountain?
  3. 5. What mountain has nappes?