Third Puzzle

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Across
  1. 4. Living things and their surroundings interacting with each other
  2. 6. The place where we could record what we noticed and learned
  3. 7. Something connected with the sea and human activity around it
  4. 10. A natural feature we could trace and identify during the journey
  5. 11. The ideas, practices and ways of life that differ from place to place
  6. 13. What kept changing outside our train windows
  7. 14. The subject that came alive as we watched the land change
  8. 15. The network carrying us across different regions of India
  9. 16. Something we needed to understand while following our journey on a map
  10. 17. People working together towards a shared purpose
  11. 18. The path followed during our journey
Down
  1. 1. Something from nature that people use
  2. 2. The study of the shape and features of land
  3. 3. A way of trading intended to give producers a fairer deal
  4. 5. The skill of noticing details rather than simply looking
  5. 7. The tool we used to understand our route and the landscape around it
  6. 8. The exchange of goods between people or places
  7. 9. A tool that helps us find direction
  8. 12. The height of a place above sea level