Puzzle for 9E- my favorite class

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Across
  1. 3. type of farming which involves high inputs of capital in a small area of land
  2. 4. the art and science of cultivating the soil, growing crops and raising livestock
  3. 8. tectonic plate boundary where 2 plates collide
  4. 10. responsible travel to natural areas that conserve the environment,
  5. 11. a rising and overflowing of a body of water especially onto normally dry land
  6. 13. the average period that a person may expect to live.
  7. 16. when tiny pieces of the Earth's surface are moved from one place to another
  8. 17. large ecosystem
  9. 19. economic activity concerned with the processing of raw materials and manufacture of goods in factories.
  10. 20. the use of a waste product in a process to make something else.
Down
  1. 1. money spent by a tourist circulates through a country's economy creating demand
  2. 2. income remaining after deduction of taxes and social security charges
  3. 5. a tropical woodland with an annual rainfall of at least 254 centimeters
  4. 6. less important areas in a country (such as rural) where development lingers
  5. 7. Avoiding the use of plastic bags to keep the oceans clean
  6. 8. type of farming which aims selling farm products for profit
  7. 9. when humans remove or thin forests for lumber
  8. 12. an area of land that receives no more than 25 centimeters of precipitation a year
  9. 14. faster developed areas in a country (urban) where great growth occurs
  10. 15. the land along a sea
  11. 18. liquid molten rock that builds up below the Earth's crust