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Across
  1. 5. The toxic substance secreted by a snake or spider.
  2. 7. An electrical circuit that converts alternating current () to direct current ().
  3. 9. The fertile South American lowlands, primarily in Argentina and Uruguay.
  4. 10. The term for a win in boxing when an opponent is unable to rise before a count of ten.
Down
  1. 1. The green pigment in plants essential for photosynthesis.
  2. 2. The state of metabolic depression in endotherms during cold periods.
  3. 3. A formally concluded agreement between two or more sovereign states.
  4. 4. The former trade agreement between the, Canada, and Mexico.
  5. 6. The term for a tree that sheds its leaves annually.
  6. 8. A passive electrical component that stores energy in a magnetic field.