matter

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Across
  1. 3. a conversion of a solid into its liquid state on heating
  2. 6. a conversion of a gas into its liquid state on cooling
  3. 9. The amount of matter present in a body
Down
  1. 1. a conversion of a liquid into its solid state on cooling
  2. 2. The force with which the Earth pulls a body towards itself
  3. 4. a state of matter which has a definite shape and volume
  4. 5. The amount of space a substance occupies
  5. 7. the smallest structural unit of matter
  6. 8. a state of matter which has least intermolecular forces of attraction