Revision (music / nature)

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Across
  1. 1. You hear it in commercials.
  2. 3. You do it when you listen to a song and sing it at the same time.
  3. 5. It's full of sand. Camels live there.
  4. 6. You see many of them in the UK.
  5. 8. You hear it in shops.
  6. 11. They are several mountains together.
  7. 13. It's a huge amount of water falling off a cliff.
  8. 15. It's a flat area.
Down
  1. 2. It's made of ice and snow.
  2. 4. It's a type of music which is performed right here in front of you.
  3. 6. It's under water.
  4. 7. You do it when you listen to a song and sing it without words.
  5. 9. It's another word for a melody.
  6. 10. It's a sound which makes particular rhythm.
  7. 12. Ships find a quiet place there.
  8. 14. They are the words from a song.