Nature

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Across
  1. 6. Lowland area between hills or mountains.
  2. 7. Moment when the sun disappears below the horizon.
  3. 8. Earth's natural satellite, seen in the night sky.
  4. 9. Moment when the sun appears above the horizon.
  5. 11. Large area covered with trees and undergrowth.
  6. 12. Vast expanse of saltwater covering the Earth.
  7. 14. Natural flowing watercourse, often with banks.
Down
  1. 1. Tall, rugged landform with peaks and slopes.
  2. 2. Dry, arid region with little or no vegetation.
  3. 3. Vertical flow of water from a height.
  4. 4. Multicolored arc in the sky after rain.
  5. 5. Slow-moving mass of ice formed from snow accumulation.
  6. 8. Grassland area with wildflowers and low vegetation.
  7. 10. Luminous celestial object visible in the night sky.
  8. 13. Sandy or pebbly shore by the ocean or lake.