Crossword

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Across
  1. 2. The capital of Germany
  2. 4. The process by which plants make their own food
  3. 7. The molten rock beneath Earth’s surface
  4. 8. The language with the most native speakers in the world
  5. 10. A triangle with all sides equal
  6. 12. The line dividing Earth into Northern and Southern Hemispheres
  7. 13. The fastest land animal
  8. 15. The scientific name for human beings
  9. 17. The smallest unit of an element
Down
  1. 1. A system of stars forming a recognizable pattern
  2. 3. The largest continent
  3. 5. An animal that eats both plants and meat
  4. 6. Largest ocean in the world
  5. 9. What bats use to "see"
  6. 10. Tallest mountain in the world
  7. 11. The "ship" of the desert
  8. 14. Smallest prime number that's not 1
  9. 16. A system in which goods are exchanged without money