Particle Model of Matter

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Across
  1. 3. A state of matter where particles are far apart and move freely in all directions.
  2. 6. The process where a solid changes directly into a gas without becoming a liquid.
  3. 7. The energy that particles have due to their movement.
  4. 8. The process where a gas turns into a liquid when it is cooled.
  5. 10. A law stating that the pressure of a gas is inversely proportional to its volume at a constant temperature.
  6. 11. A tiny piece of matter, such as an atom or molecule, that makes up all materials.
  7. 13. The energy required to change 1 kg of a substance from liquid to gas without changing its temperature.
  8. 15. The mass of a substance per unit volume, calculated as mass divided by volume.
  9. 17. The amount of energy required to raise the temperature of 1 kg of a substance by 1°C.
  10. 18. The amount of matter in an object, measured in kilograms (kg).
  11. 20. The process where a liquid changes to a gas throughout the substance at its boiling point.
  12. 21. A measure of the average kinetic energy of the particles in a substance.
  13. 23. The energy required to change 1 kg of a substance from solid to liquid without changing its temperature.
  14. 25. The force exerted per unit area by the particles in a gas.
Down
  1. 1. The process where particles at the surface of a liquid gain enough energy to become gas.
  2. 2. The process of changing from a liquid to a solid.
  3. 4. The amount of energy required to change the state of 1 kg of a substance without changing its temperature.
  4. 5. The three main forms of matter: solid, liquid, and gas.
  5. 9. A state of matter where particles are tightly packed in a fixed shape and position.
  6. 12. A state of matter where particles are close together but can move past each other, allowing the substance to flow.
  7. 14. The total energy stored in the particles of a substance due to their movement and positions.
  8. 16. The change in total energy when a substance is heated or cooled, affecting its temperature or state.
  9. 19. The process of changing from a solid to a liquid at the melting point.
  10. 22. The amount of space an object or substance takes up, measured in cubic meters (m³).
  11. 24. A material that slows down the transfer of thermal energy.