countable and uncountable nouns

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Across
  1. 1. A small animal that barks and is a common pet(countable).
  2. 5. A fruit that keeps the doctor away(countable).
  3. 6. An item you sit on at home or in class(countable).
  4. 9. Knowledge or facts learned through study(uncountable).
Down
  1. 2. A valuable metal often used in jewelry(uncountable).
  2. 3. A common form of transportation with four wheels(countable).
  3. 4. A liquid essential for life(uncountable).
  4. 6. A common drink made from beans and served hot or cold(uncountable).
  5. 7. Something you use to write on paper(countable).
  6. 8. The gaseous substance we breathe(uncountable).