4. A solid or a gas can become (steam, a liquid).
5. Ice is a (gas, (solid).
6. When you saw wood, you cause a (chemical, physical) chang
True or False
1. When mixtures are formed, a physical change takes pla
2. A liquid cannot become a solid or a gas. fulse
3. Heat makes molecules move slower.
4. The amount of heat needed for a substance to chang
the same for all matter.
5. A physical change takes place when you change th
substance.
6. The molecules in sawdust are different from the