Phases of Water

Heat or cool a container of water and observe the phase changes that take place. Use a magnifying glass to observe water molecules as a solid, liquid, or gas. Compare the volumes of the three phases of water.

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  • Understand that, in normal conditions, water can exist in three different states.
  • Compare solids, liquids, and gases in terms of having a fixed shape or volume.
  • Describe the phase changes that occur when heat is added to or removed from water.
  • Compare the structure, spacing, and motion of molecules in solids, liquids, and gases.
  • Compare the volume and density of each phase. (Extension)
  • Notice that water is denser as a liquid than a solid. (Extension)
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