WHAT AM I?

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Across
  1. 1. I am the amount of matter that makes up an object.
  2. 5. I am made up of many gases
  3. 7. I have a fixed shape.
  4. 8. I am that process that happens when water changes into vapour
  5. 9. I am the process that happens when water vapour changes to water
Down
  1. 2. I am another name for water vapour.
  2. 3. I am the process that happens when water changes to ice.
  3. 4. I flow very easily.
  4. 6. Change in the state of matter happens when I am gained or lost.
  5. 7. I an granular in shape.