General Knowledge

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Across
  1. 3. Animal group that feeds young with milk
  2. 5. Land surrounded by water on three sides
  3. 7. Process plants use to convert sunlight into energy
  4. 10. Type of money used in a country
  5. 11. Imaginary line dividing Earth into Northern and Southern Hemispheres
  6. 13. Process where land is worn away by water or wind
  7. 14. Process of liquid turning into gas
  8. 15. Step-by-step set of instructions to solve a problem
Down
  1. 1. System of government where people vote for leaders
  2. 2. Coldest continent on Earth
  3. 4. Measure of electrical potential difference
  4. 6. Closest planet to the Sun
  5. 8. Element essential for human respiration
  6. 9. Force that attracts objects toward each other
  7. 12. Path an object takes around another in space