Across
- 1. – The amount of mass in a given volume (how tightly matter is packed).
- 5. – Matter with a definite shape and volume; particles are tightly packed and vibrate in place.
- 8. – The smallest unit of an element; made of protons, neutrons, and electrons.
- 9. Point – The temperature at which a solid changes to a liquid.
- 10. – To change from a gas to a liquid when heat is removed.
- 12. – A very small piece of matter (like an atom or molecule).
- 13. – Matter with a definite volume but no definite shape; particles are close but can slide past each other.
- 16. – To change from a liquid to a solid when heat is removed.
- 18. – To decrease in volume or draw together (often when cooled).
- 19. – Matter with no definite shape or volume; particles are far apart and move freely.
Down
- 2. – To change from a liquid to a gas at the surface of the liquid.
- 3. Point – The temperature at which a liquid changes to a solid.
- 4. Point – The temperature at which a liquid changes to a gas throughout the liquid.
- 6. – Anything that has mass and takes up space.
- 7. Words and Definitions
- 9. – Two or more atoms bonded together.
- 11. – The spreading of particles from an area of high concentration to an area of low concentration.
- 14. – To change from a solid to a liquid when heat is added.
- 15. – A high-energy state of matter where particles are charged (ions and electrons); found in stars and lightning.
- 17. – To increase in volume or spread out (often when heated).