KEY Phase Change Worksheet--Identify the Substance.docx - Free Printable

Educational worksheet: KEY Phase Change Worksheet--Identify the Substance.docx. Download and print for classroom or home learning activities.

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- The graph shows temperature vs. time for a substance being heated.
- Segment A represents the solid phase heating up.
- Segment B represents the melting point, where the solid turns to liquid at a constant temperature (around 70°C).
- Segment C represents the liquid phase heating up.
- Segment D represents the boiling point, where the liquid turns to gas at a constant temperature (around 140°C).
- Segment E represents the gas phase heating up.
- The flat segments (B and D) indicate phase changes where added heat is used to break intermolecular bonds rather than increase temperature.

Parent Tip: Review the logic above to help your child master the concept of phase change graph worksheet.

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