Are You Smarter Than a 5th Grader

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Across
  1. 2. World War II's "D-Day" location
  2. 4. The longest river in the United States
  3. 5. Scientific classification for a kangaroo
  4. 7. Capital of New York
  5. 9. The hardest mineral
  6. 10. An exaggeration to show emphasis
  7. 11. Universal donor
  8. 14. Classical music instrument in the string section
  9. 15. Solid, liquid and ___
  10. 16. 3(5)+1=
  11. 18. Usually abbreviated as oz.
Down
  1. 1. The plural is lice
  2. 3. The first 'A' in NASA
  3. 5. Powerhouse of the cell
  4. 6. The five dollar president
  5. 8. Birthplace of Lady Liberty
  6. 12. A man of many inventions, most popular being the light bulb
  7. 13. Indicated on the periodic table as the letter N
  8. 17. Number of amendments in the Bill of Rights