Across
- 2. What word describes a change that cannot be easily reversed?
- 5. What indicator describes a reaction that produces a new smell, like rotting food?
- 6. What term describes the process when salt separates into positive and negative parts in water?
- 8. A reaction may require energy from the ________ in order to take place.
- 10. What indicator involves bubbles forming from a reaction, as in vinegar and baking soda?
- 11. What kind of change involves breaking and forming bonds between atoms?
- 13. What is the name for the solid that forms when two solutions produce an insoluble product?
Down
- 1. What word describes a metal made by mixing molten metals (for example, brass)?
- 2. What gas is produced when vinegar and baking soda react? (two words)
- 3. What example from the text shows a reversible change involving freezing?
- 4. What is the term for the newly formed substances after a chemical reaction?
- 7. What is the term for a change in how a material feels (for example, sanding wood)?
- 9. What term describes charged atoms or molecules, such as those formed when salt dissolves in water?
- 12. What state change is shown when water turns into steam? (liquid → ?)