Just a puzzle

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Across
  1. 2. A vehicle with two wheels
  2. 3. We wear this on our feet
  3. 5. The largest ocean
  4. 10. A flying vehicle
  5. 13. A bird that can mimic sounds
  6. 15. A place where books are kept
  7. 17. Used to write on paper
  8. 19. It shines in the sky at night
  9. 20. Opposite of night
Down
  1. 1. Device used to call people
  2. 4. A place where doctors work
  3. 6. Frozen water
  4. 7. The red planet
  5. 8. We drink this when thirsty
  6. 9. Opposite of hot
  7. 11. A baby dog
  8. 12. The color of grass
  9. 14. The season after summer
  10. 16. A yellow fruit loved by monkeys
  11. 18. The king of the jungle