Vocab

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Across
  1. 3. an economic system in which economic decisions and the pricing of goods and services
  2. 5. a system of government in which the same territory is controlled by two levels of government
  3. 8. sail or travel all the way around
  4. 10. a conqueror, especially one of the Spanish conquerors of Mexico and Peru in the 16th century.
Down
  1. 1. a biological community of interacting organisms and their physical environment.
  2. 2. a tax or duty to be paid on a particular class of imports or exports.
  3. 4. a natural feature of the earth's surface.
  4. 6. a narrow passage of water connecting two seas or two other large areas of water.
  5. 7. is achieved through the presence of antibodies to that disease in a person's system
  6. 9. is the sea lane between the Atlantic and Pacific oceans through the Arctic Ocean, along the northern coast of North America