Crossword

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Across
  1. 4. (The planet known as the Red Planet)
  2. 5. (Famous scientist who developed the theory of relativity)
  3. 7. (Organ that pumps blood)
  4. 9. (Country known for pyramids)
  5. 10. (Largest planet in our solar system)
  6. 11. (The first president of the United States)
  7. 13. (The capital city of Japan)
  8. 14. (Number of continents on Earth)
  9. 18. (The process by which plants make food)
  10. 22. (Instrument used to see objects in space)
Down
  1. 1. (The smallest continent)
  2. 2. (Tallest mountain in the world)
  3. 3. (Country known for its maple syrup)
  4. 6. (The largest ocean)
  5. 8. (Instrument used to measure temperature)
  6. 10. Rowling (Author of the "Harry Potter" series)
  7. 12. (Chemical symbol for water)
  8. 13. (The sport where you might hear 'love')
  9. 15. (The longest river in the world)
  10. 16. (Country where the Great Wall is located)
  11. 17. (First element on the periodic table)
  12. 19. (The fastest land animal)
  13. 20. Whale (Largest mammal in the world)
  14. 21. (The currency of the United Kingdom)