Classify each change listed below as either a chemical or physical change in matter.
Column A
1. Liquid water boiling and becoming steam
2. Silver metal tarnishing and becoming silver sulfide.
3. Paper burning
4. Bending copper wire
5. Dissolving salt in water
6. Iron rusting to become iron oxide.
Column B
A. Chemical change
B. Physical change
1. A. Chemical change
2. A. Chemical change
3. A. Chemical change
4. B. Physical change
5. A. Chemical change
6. A. Chemical change