Science puzzle

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Across
  1. 2. or sea
  2. 5. transfer of heat through movement of a fluid
  3. 8. hemisphere the half of Earth north of the equator
  4. 11. phase the appearance of the Moon, as seen by an
  5. 12. a wind that blows from the sea to the land
  6. 13. current the circular motion of a fluid (such as air)
  7. 14. axis an imaginary line through the center of Earth that connects the North Pole
  8. 16. horizon
  9. 17. an imaginary horizontal line around the middle of Earth
  10. 18. sunlight that strikes Earth’s surface at close to a 90° angle
Down
  1. 1. horizon
  2. 3. change from a gas to a liquid
  3. 4. sunlight that strikes Earth’s surface at an acute angle (less than 90˚)
  4. 6. Pole the northernmost point on Earth
  5. 7. a wind that blows from the land to the sea
  6. 9. on Earth
  7. 10. the time at which the Moon appears above the
  8. 11. the time at which the Moon disappears below the
  9. 15. the line along which the sky appears to meet the
  10. 19. the South Pole