6th Grade Puzzle ~ general

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Across
  1. 2. What gas do plants take in from the air to help them grow?
  2. 3. What is the currency used in Japan?
  3. 4. What planet is known as the Red Planet?
  4. 5. What is the smallest prime number?
  5. 8. Who wrote the play *Romeo and Juliet*?
  6. 10. What famous ship sank after hitting an iceberg in 1912?
  7. 14. What do we call an animal that eats only plants?
  8. 15. How many continents are there on Earth?
  9. 17. Which ocean is the largest?
  10. 18. What type of sentence is this: "Wow, that’s amazing!"
  11. 19. In what country would you find the Great Pyramid of Giza?
Down
  1. 1. What is the process by which plants make their own food?
  2. 6. What is the capital city of the United States?
  3. 7. What is the freezing point of water in degrees Celsius?
  4. 9. How many sides does a hexagon have?
  5. 11. What do we call a word that has the same meaning as another word?
  6. 12. Which planet is closest to the sun?
  7. 13. What part of the body pumps blood?
  8. 16. What is the longest river in the world?