Across
- 5. Solid → Liquid (energy added).
- 7. The physical form (solid, liquid, gas) of a substance.
- 12. A characteristic observed without changing composition.
- 13. The ratio of mass to volume (mass ÷ volume).
- 16. The amount of space an object occupies.
- 17. Gas → Liquid (energy removed).
- 19. The total energy of particle motion in a substance.
- 21. The movement of energy from one object or system to another.
- 24. Two or more atoms chemically bonded together.
- 25. Liquid → Solid (energy removed).
Down
- 1. Solid → Gas without liquid phase (energy added).
- 2. The average kinetic energy of particles.
- 3. All matter is made of particles in constant motion; temperature affects that motion.
- 4. A repeating pattern of particles in a solid.
- 6. A change in appearance or state without changing identity.
- 8. The amount of matter in an object.
- 9. A characteristic describing how matter reacts to form new matter.
- 10. A change that produces a new substance.
- 11. The force that holds atoms together in molecules.
- 14. The force exerted by gas particles on container walls.
- 15. A molecule made of atoms of two or more elements.
- 18. Anything that has mass and takes up space.
- 20. Liquid → Gas (energy added).
- 22. The smallest unit of matter that retains an element’s properties.
- 23. A pure substance made of only one kind of atom.