Across
- 4. Energy The energy of moving particles in matter; heat energy.
- 5. The amount of material (stuff) in an object.
- 8. The amount of space something takes up.
- 9. How hot or cold something is; a measure of the average motion of particles.
- 10. A substance made when two or more different elements combine (like water = hydrogen + oxygen).
- 11. The force of gas particles pushing on the walls of their container.
- 12. A state of matter with a definite volume but takes the shape of its container.
- 13. A state of matter with no definite shape or volume — it spreads out to fill its space.
Down
- 1. Substance Matter made of only one kind of particle; includes elements and compounds.
- 2. The smallest building block of matter; makes up everything.
- 3. A pure substance made of only one kind of atom (like oxygen or gold).
- 5. Anything that has mass and takes up space. Everything around you is made of matter!
- 6. A state of matter with a definite shape and definite volume.
- 7. Two or more atoms joined together (like H₂O or O₂).
- 10. of State When matter changes from one state to another (like melting, freezing, or evaporating).