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Understanding the Phases of Matter: Solids, Liquids, and Gases Explained

This lesson delves into the three primary phases of matter: solid, liquid, and gas. A solid has a definite volume and shape, with closely packed particles that vibrate in place. Liquids have a definite volume but no fixed shape, adapting to the contours of their containers. Gases, in contrast, possess neither a definite shape nor volume, with particles spreading out to fill any available space. The lesson also covers phase changes: melting, freezing, boiling, evaporating, and condensing, along with the concepts of latent heat of fusion and vaporization.

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Understanding the Phases of Matter: Solids, Liquids, and Gases Explained

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Presentation Transcript

  1. Lesson 7: Just A Phase Key Terms

  2. Solid A solid has definite volume and definite shape. The particles in a solid are closely packed and vibrate in relation to one another.

  3. Liquid A liquid has definite volume, but no definite shape. A liquid takes on the shape of its container.

  4. Gas A gas has no definite shape or volume. Its particles have enough energy to fill the entire container it is in.

  5. The Phases of Matter

  6. Changing from a Solid to a Liquid Melting

  7. Changing from a liquid to a solid Freezing

  8. Boiling Changing from a liquid to a gas at a substance’s boiling point. Also called vaporization

  9. Changing from a liquid to a gas at the surface of a liquid. Evaporating

  10. Condensing Changing from a gas to a liquid Due to a change in temperature

  11. Latent Heat of Fusion The heat absorbed when a solid turns into a liquid

  12. Latent Heat of Vaporization The heat absorbed when a liquid turns into a gas.

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