Social studies

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Across
  1. 1. Business of producing crops to sell
  2. 7. Based on preserving resources rather than using them up
  3. 8. Lagres masses of ice and packed snow
  4. 12. Send to other countries for aid or profit
  5. 13. Rain below normal for a long period of time
  6. 14. Barrier that controls the flow of water
  7. 15. Layers of rock beneath the earth
Down
  1. 2. Mild climates as well as extremes of and hot
  2. 3. At the center lie 48
  3. 4. Mountains are dry from the air
  4. 5. farming Growing just enough food to fees their families
  5. 6. Narrow strips of land that extend out into a body of water
  6. 9. Several mountains that often run parallel to one another
  7. 10. Underground rivers and underwater caves
  8. 11. Made less extreme by a higher elevation