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Identify phase changes

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Identify phase changes — free printable Middle School Science worksheet

Middle school students examine the transitions between solid, liquid, and gas states in this worksheet on identifying phase changes, connecting particle behavior to observable phenomena like melting, evaporation, and condensation. Teachers can use it during a physical science unit on matter to help students move from naming states to understanding the energy transfers involved. The skill sits at the heart of chemistry and earth science, supporting further study of the water cycle, chemical reactions, and thermodynamics.

Learning objectives

  • Identify and name each phase change by the states of matter involved
  • Explain whether energy is absorbed or released during a given phase change
  • Connect phase change vocabulary to real-world examples and diagrams

How to use this worksheet

  1. Select “Sign in / Sign up to download”, then sign in with Google or email to get the PDF from KiwiBee Printables.
  2. Print at home or in class for Middle School; it's no-prep, with no extra materials needed.
  3. Use the included answer key to mark it in seconds.

Good for

ClassworkHomeworkWarm-upCentersSmall groups

Answer Key

Answer key for Identify phase changes — free printable Science worksheet

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