States of Matter Vocabulary

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Across
  1. 4. The temperature at which a liquid turns into a gas throughout the liquid.
  2. 9. The energy an object has because of the movement of its particles; more heat means more thermal energy.
  3. 12. Anything that has mass and takes up space.
  4. 14. The process where a solid turns into a liquid due to heat.
  5. 15. A state of matter that has no definite shape or volume and expands to fill its container.
  6. 17. A group of two or more atoms bonded together.
  7. 18. A state of matter that has a definite volume but takes the shape of its container.
  8. 19. The smallest unit of matter that makes up everything around us.
Down
  1. 1. The process where a gas changes into a liquid, like water droplets forming on a cold glass.
  2. 2. The process where a gas changes directly into a solid without becoming a liquid first, like frost forming on a cold surface.
  3. 3. A liquid’s resistance to flow; thick liquids like honey have high viscosity.
  4. 5. The amount of mass in a certain volume of matter (Density = Mass ÷ Volume).
  5. 6. A high-energy state of matter where atoms lose their electrons, found in things like lightning and the sun.
  6. 7. The process where a liquid turns into a solid when cooled.
  7. 8. The temperature at which a liquid turns into a solid.
  8. 10. The process where a liquid changes into a gas at the surface, like water turning into vapor.
  9. 11. The process where a solid changes directly into a gas without becoming a liquid first, like dry ice.
  10. 13. The energy of motion; particles in gases move faster than those in solids.
  11. 14. The temperature at which a solid turns into a liquid.
  12. 16. A state of matter that has a definite shape and volume.