• Water is the only substance on Earth that is present in all three states of matter.
  • All three phases may be present in a single location or in a region.
  • Water expands when it freezes, even though all other substances contract.
  • Water has high surface tension because polar molecules tend to stick together.
  • Water vapor is invisible, but clouds that form when water vapor condenses are not.
  • Use the resource below to answer the questions that follow.
  • The three phases are solid (ice or snow), liquid (water), and gas (water vapor)
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