Solids, liquids and gases

• What are the three states of matter?

  Solid, liquid, and gas
• How does the particle model explain the properties of solids, liquids, and gases?

  It describes the arrangement and movement of particles in each state
• What is a particle in the context of matter?

  A small piece of matter, such as protons, neutrons, electrons, atoms, ions, or molecules
• What does the particle model illustrate about the energy of particles?

  It describes the arrangement, movement, and energy of particles in a substance
• What are physical properties of substances?

  Descriptions of appearance or behavior without involving chemical reactions
• What are the characteristics of solids, liquids, and gases based on the particle model?

  • Solids: Fixed shape, cannot flow, cannot be compressed
  • Liquids: Flow, take the shape of their container, cannot be compressed
  • Gases: Flow, fill their container, can be compressed
• Why can't solids flow?

  Because their particles cannot move from place to place
• Why are solids not compressible?

  Because their particles are close together and have no space to move into
• How do liquids behave in terms of shape and flow?

  Liquids flow and take the shape of their container
• Why can't liquids be compressed?

  Because their particles are close together and have no space to move into
• How do gases behave in terms of shape and flow?

  Gases flow and completely fill their container
• Why can gases be compressed?

  Because their particles are far apart and have space to move into
• What is the difference in particle arrangement and movement among solids, liquids, and gases?

  • Solids: Particles are tightly packed and vibrate in place
  • Liquids: Particles are close but can move around each other
  • Gases: Particles are far apart and move quickly in all directions