MORE GENERAL KNOWLEDGE..IM RUNNING OUT OF IDEAS

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Across
  1. 3. Most abundant gas on planet Earth.
  2. 7. An instrument with 88 keys.
  3. 8. Artist of the painting "The Mona Lisa"(8-2-5)
  4. 9. The country the Amazon River flows primarily through.
  5. 10. Known as "The King of Pop". (8-7)
  6. 12. Country that invented paper.
  7. 13. Medical term for high blood pressure..like you give us.
Down
  1. 1. Founder of Amazon. (4-5)
  2. 2. Hardest natural substance on Earth.
  3. 4. The number of players per a soccer team on the field.
  4. 5. A Buddhist's achievement of complete inner peace.
  5. 6. Healthiest form of cooking...gross.
  6. 10. Planet closest to the sun.
  7. 11. Sport known as "The Gentleman's Game".