What's the matter?

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Across
  1. 1. The pink tissue in your mouth that surrounds and supports your teeth.
  2. 4. The quality of being full of light or shining.
  3. 8. The hard, outer layer of your teeth that protects them.
  4. 9. What plants do over time, getting bigger and taller.
Down
  1. 2. The watery liquid in your mouth that helps you chew and swallow food.
  2. 3. The opposite of hard, something that is not firm or rigid.
  3. 4. What you do when you take a piece of food with your teeth.
  4. 5. The action of breaking down food in your mouth using your teeth.
  5. 6. Tiny organisms that can cause illness if they enter the body.
  6. 7. The opposite of soft, something that is firm and not easily bent.