group C

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Across
  1. 1. a solid that forms when some substances are mixed
  2. 6. sometimes we use this action to freeze
  3. 7. it happens when a liquid turns to gas
  4. 9. a colourless, transparent, odourless liquid that forms the seas, lakes, rivers, and rain and it’s the basis of the fluids of living organisms
Down
  1. 2. a measure of the ability of a substance, or more generally of any physical system, to transfer heat energy to another physical system
  2. 3. a molecule that is created when something is burning
  3. 4. it’s a synonym of a basic salt
  4. 5. a substance that doesn’t have any color
  5. 8. it is an energy that we use for heating substances